[求助]求助og上阅读2道题，9。12考试。帮忙啊，谢谢！

Practice Set 4 的讲Aggression的
第一题 According to paragraph 2,what evidence indicates that aggression in animals is related to the  hypothalamus?
A. Some aggressive animals species have a highly developed hypothalamus.
B,Artificial stimulation of the hypothalamus results in aggression in animals.
C. Animals behaving aggressively show increased activity in the hypothalamus.
D. Animals who lack a hypothalamus display few aggressive tendencies.

这题我选的B 答案是C..我觉得原文提到了stimulation 啊，为什么不是B啊。

还有就是讲swimming machines那篇 Practice Set 6
11题 就是排序题
Consequently,tunas do not need to suck in water.
我选的C 看了解释觉得还是不够清楚。我想知道B哪里比C好