题目选项分析

前提：雨季的时候蚊子到了高峰期
结论：所以猴子抓捕XX 虫子就是为了防止蚊子
论证类型：因果论证-加强因果关系-增强：只有在雨季的时候（蚊子高峰期）的时候猴子才会抓捕XX虫子
如果是削弱因果关系：在一年四季猴子都会抓捕XX虫子
这道题关键是抓住前提雨季（蚊子高峰期），其他选项迷惑性都比较强

千足虫available的时间只有雨季。
文章的逻辑
P：M有两种化学物质能驱蚊。Rub罕见除了雨季，雨季的时候蚊子最多。
C：猴子Rub是因为Rub能驱蚊
猴子rub可能有其他目的，但是只在雨季rub是因为千足虫只在雨季available，并不是因为猴子怕了蚊子想拿千足虫rub抵御。
可削弱结论。

可能的。因为在别的时候得不到mill，自然无法rub，说明有他因。

如果平时这猴也能搞到millipede，但是他只在雨季文字多的时候rub millipede，那说明 搞millipede 是为了驱蚊。 但是如果平时你就搞不到millipede，只有雨季的时候才搞得到，你没有办法证明这是用来驱蚊的，没准这个millipede secrets a kind of chemical which can increase their sexual ability, while the millipede can only obtain in the rainy days. Therefore, the monkey rub these for papapa...

One of the premises is that the monkeys only rub them into their skin during the rainy season when the mosquito population is highest. They use this premise to arrive at the conclusion that this is only done to protect against mosquites. But adding this additional information that millipedes are only available during the rainy season cast doubt on this logic. It could now be that the only reason they rub them into their skin during the rainy season is because this is the only season they're available. It may just be a coincidence that the millipedes are availabe only during the rainy season when their needed and the monkeys might do the same if millipedes were available in non rainy season.

因为如果其他时候也有millipedes
但是monkey只在雨季rub那就说明rub是因为其他原因而不是为了驱赶蚊子