[Q]: James spent a lot of time indoors, and didn't get out much like Rob, his friend, who loved outdoors stuff. Which friend was exposed more to indoor pollution?
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[A]: James

[Q]: Jim and Robert are identical twins both getting their yearly physical check ups at the doctor's office. They are trying to figure out if they are at risk for any future health problems. Both of them consume the same diet and exercise the same amount, and were both raised in the exact same environment. But, Jim has smoked tobacco frequently for several years and Robert has never smoked tobacco in his life. Who is at a lower risk for getting throat cancer the future?
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[A]: Robert

[Q]: Sam is going to visit his grandfather. His grandfather lives in a retirement home and can barely take care of himself anymore. Will Sam's grandfather have a strong or weak immune system given his age?
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[A]: weak

[Q]: Scientists studied two groups of mammals. Group One developed natural selection after a few decades, while group Two didn't. It was yet to be determined why that happened. Which group will survive in greater numbers?
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[A]:
Group One