What did Ethan Sims make his subjects do?A.Battle
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What did Ethan Sims make his subjects do?
A.Battle their genetic inheritance.
B.Increase their weight.
C.Stay at home.
D.Lower their weight.
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答案：B
题干意思：Ethan Sims让他的调查对象干什么？ 第四段中：Ethan Sims,of the University of Vermont , got prisoners to volunteer to gain weight．佛蒙特州立大学的Ethan Sims 在罪犯中招募志愿者去增重。可见选项B是正确的答案。