While it costs about the same to run nuclear plants as other types of power plants, it is the fixed costs that stem from building nuclear plants that makes it more expensive for them to generate electricity.


While it costs about the same to run nuclear plants as other types of power plants, it is the fixed costs that stem from building nuclear plants that makes it more expensive for them to generate electricity.

A. While it costs about the same to run nuclear plants as other types of power plants, it is the fixed costs that stem from building nuclear plants that makes it more expensive for them to generate electricity.

B. While the cost of running nuclear plants is about the same as for other types of power plants, the fixed costs that stem from building nuclear plants make the electricity they generate more expensive.

C. Even though it costs about the same to run nuclear plants as for other types of power plants, it is the fixed costs that stem from building nuclear plants that makes the electricity they generate more expensive.

D. It costs about the same to run nuclear plants as for other types of power plants, whereas the electricity they generate is more expensive, stemming from the fixed costs of building nuclear plants.

E. The cost of running nuclear plants is about the same as other types of power plants, but the electricity they generate is made more expensive because of the fixed costs stemming from building nuclear plants.


Correct Answer Below (so you don’t see it while reviewing the question)

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While it costs about the same to run nuclear plants as other types of power plants… Explanation

Here’s another tough GMAT comparisons question with some sneaky subject verb agreement and pronoun ambiguity thrown in for good measure. Here’s an interesting scientific study on pronoun ambiguity.

For Sentence Correction Comparisons remember to:

1. Identify what is being compared.

2. Keep the items compared as parallel as possible both in structure and type

So, what’s being compared? 

The cost of running the two types of power plants, nuclear and other types.

Now let’s look at the answers making sure to keep those two items matched.

Let’s also keep an eye out for any low hanging fruit.

Just because the main attraction is the comparison doesn’t mean that there aren’t some other easier things to take advantage of. Always be ready to pounce on subject verb/pronoun noun agreement and pronoun ambiguity.

To reach the highest of heights on GMAT SC it’s key to be flexible and to avoid fixating on any one error.

Sometimes some dinky little difference between the sentences will crack it all open.

More detail below.

While it costs about the same to run nuclear plants as other types of power plants, it is the fixed costs that stem from building nuclear plants that makes it more expensive for them to generate electricity.

(A) While it costs about the same to run nuclear plants as other types of power plants, it is the fixed costs that stem from building nuclear plants that makes it more expensive for them to generate electricity.

Subject verb agreement: fixed costs make. And: the comparison is off.

This one compares the costs to run nukes vs other types of power plants. You must compare plants to plants or costs to costs.

(B) While the cost of running nuclear plants is about the same as for other types of power plants, the fixed costs that stem from building nuclear plants make the electricity they generate more expensive.

(C) Even though it costs about the same to run nuclear plants as for other types of power plants, it is the fixed costs that stem from building nuclear plants that makes the electricity they generate more expensive.

Subject verb agreement: fixed costs make.

(D) It costs about the same to run nuclear plants as for other types of power plants, whereas the electricity they generate is more expensive, stemming from the fixed costs of building nuclear plants.

What is “they”? other types of plants or nuclear? It’s impossible to tell. This is a good example of pronoun ambiguity.

(E) The cost of running nuclear plants is about the same as other types of power plants, but the electricity they generate is made more expensive because of the fixed costs stemming from building nuclear plants.

Comparison is off. The cost of running nuclear vs other types of power plants. What is “they”? other types of plants or nuclear? Another good example of pronoun ambiguity.

Correct Answer: B

Wrapping it up

-For comparisons always ID what’s being compared and then analyze the structure to make sure you’ve got like things compared in a similar way

-Keep an eye out for low hanging fruit. The big flashy obvious splits aren’t always the easiest to analyze. Sometimes a simple little agreement issue will eliminate half the choices and leave you a very simple split.

Additional Challenging GMAT Sentence Correction Comparison Questions

In no other historical sighting did Halley’s Comet cause such a worldwide sensation as did its return in 1910–1911.

Inuits of the bering sea were in isolation from contact with europeans longer than Aleuts or Inuits of the north pacific and northern Alaska.

One of the primary distinctions between our intelligence

For some SC guidance, here’s a link to a breakdown of GMAT sentence correction.