[Q]: John is a nuclear scientist who works at the Fermi lab. Today, in front of him he has four samples, sample A, sample B, sample C, and sample D. Sample A is the naturally occurring uranium. Sample B is enriched uranium. Sample C is the U-238, and sample D is the U-235. He needs to figure out how to best use them. Given the paragraph above, please answer correctly the following question: Which sample would less likely be used as fuel, sample C or sample D?
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[A]: sample C
input: Please answer the following: Two friends liked studying about the Earth's atmosphere. Vick studied more about the troposphere, while Frank studied more about the Greenhouse Effect. Given the paragraph above, please answer correctly the following question: Which friend studied more about short wavelength solar energy?
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output: Frank
Please answer this: Brad and Dale went to the doctor for a check up. Brad did some blood tests and found out he has very high cholesterol levels, while his partner Dale had normal cholesterol levels, and was very healthy. Brad got scared and started worrying. Given the paragraph above, please answer correctly the following question: Which friend was more at risk for heart disease?
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Answer: Brad
Problem: Two brothers had very different diets. Vick would constantly eat foods high in fat and would frequently overeat. Zack on the other hand, had a higher metabolic rate, a faster metabolism, and he would eat the correct amount of calories. Given the paragraph above, please answer correctly the following question: Which brother had a lower chance of developing type 2 diabetes?

A: Zack
Problem: Given the question: Sarah and Sophie are sisters living in two different cities. Sarah lives in a very rural area with hardly any air pollution. Sophie lives in a heavily industrialized urban area with many factories and people driving cars to their destinations. This all leads to Sophie's city having a large amount of pollution going into the atmosphere. Given the paragraph above, please answer correctly the following question: Who is more susceptible to other diseases?
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The answer is:
Sophie
Problem: Lawmakers were debating the pros and cons of Keystone XL Pipeline. One group of lawmakers proposed that the pipeline be constructed. They put their proposal in proposal A. The rival group of lawmakers proposed that the pipeline should not be build. They put their proposal in proposal B. Lawmakers would now have to choose one of the proposals. Given the paragraph above, please answer correctly the following question: Which proposal might not contaminate the aquifer, proposal A or proposal B?

A:
proposal B