Problem: Given the question: Mike lives in a cold mid-western city, where there is not much predator prey interaction. Mike noticed that in his city some squirrels have darker coat, while others have lighter coat. He also knew that darker coats are more suitable in cold environment with less predator prey interaction. He started thinking why the squirrels developed different coat colors. Given the paragraph above, please answer correctly the following question: Which squirrels would most likely reproduce in smaller numbers, lighter or darker?
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The answer is:
lighter

Problem: Given the question: Harry and Kim studied ancient humans. Kim studied a 15000 year-old settlement, before humans invented agriculture, while Harry studied a 5000 year-old village. Given the paragraph above, please answer correctly the following question: Which student studied about a village that had a lower death rate?
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The answer is:
Kim

Problem: Given the question: Toronto is home to one of the leading manufacturers of aerosol sprays in the country. Because of this, homes in Toronto often spray high levels of aerosol on a regular basis. In Saskatchewan, meanwhile, the local government enacted a ban on aerosol sprays several years ago, so their level of aerosol use is now essentially zero. Given the paragraph above, please answer correctly the following question: Which city, Toronto or Saskatchewan, will be releasing less chlorine gases?
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The answer is:
Saskatchewan