A 否定了 governor（关于 courses 这个原因）的推导，从而排除了 crime rate 受影响的一个来源，因此另外一个来源，即 argument 的推导被增强了。
C 直接支持（增强）了 argument 的推导，两者关系从相关上升到因果。

所以选C而不是A的原因是：C是直接回答问题，而A并未那么直接地回答问题（或者说，去掉C，就可以选A了 ）。
这是我的想法，请毕老师指正。

关于A C选项的解释，我还有点疑问：
Governor: Harsher conditions, including no course -> less crime incentive -> lower crime rate.
Argument: Courses -> less crime after release -> lower crime rate

可以看出，governor 和 argument 从两个不同的方向去推导 courses 和 crime rate 的关系，也就是说 crime rate 有可能被 courses 从两个方面影响。

Because schooling is particularly widespread among species of small fish, both theories assume that schooling offers the advantage of some protection from predators.B选项说了protect fish from predators

毕老师，我有个问题： whether or not 在GMAT中算不算wordy?

the brain scans of volunteers pondering ethical dilemmas
老师，如果单纯看这个名词短语， pondering ethical dilemmas想要表达的逻辑主语是志愿者，但这里用的正确么

回复所有人：答案已更新。

serious crimes committed by local teenagers

The five specially ordered shipments sent out last week were sent out on Thursday

选a

可否再解释一下C选项，to do和be able to do 不是并列的关系么

增加一个角度，D中the rate of fatty foods的意思是‘’fatty food的价格‘’；E中the rate of people更是不知所云。总结就是，the rate of sth(具体物)和consume at a rate所表达的意思大不相同。

those是copy代词，ones是同一群人。

AB中的短线：it's not a hyphen, actually; it's a dash. hyphens are shorter, and are used within two-part words (such as "two-part").
in this context, the dash essentially serves the same purpose as a comma. the only difference is that you don't use dashes at random; you use them when there is some special emphasis or irony (or both) in what you're saying.

Funding construction with a system of tolls 收过路费。。。不认识单词真可怕哎。。

key: To increase our sales, therefore, our company plans to introduce innovative, eye-catching lines of clothing much more frequently.

我看到B院长还有一种解释，说is detectable 动作没有延续性，即不知道谁能察觉，这种解释对吗？

goal is: Consequently, the corporation plans to improve employee productivity by introducing new managerial techniques

条件1: 当x=0.8； y=0.8； z=1 的时候 条件一成立，但是题目不成立，所以不充分

four times as likely as和four times more likely than都是可以的，且含义相同。

A: be likely in doing需改为be likely to do