问题详情

What did the researchers find in the experiment？
A. One chimp used about the same energy in walking on two legs as on all fours
B. Human walking used more energy than bipedal walking in chimps.
C. Two chimps used more energy walking on two legs.
D. Three chimps used less energy walking on two legs.请帮忙给出正确答案和分析，谢谢！