Information in the passage suggests that which of the following is true of carotenoids that a male animal uses for detoxification processes?

A.    They were not acquired directly from plants and algae.

B.    They cannot be replenished through foraging.

C.    They cannot be used simultaneously to brighten coloration.

D.    They do not affect the animal’s susceptibility to parasites.

E.     They increase the chances that the animal will be selected as a mate.

答案是C,我选E了，我觉得E很对啊，很明显就能找到，为什么选C呢……

It may be that males can use scarce carotenoids either for immune (25)      defense and detoxification or for attracting females.

我的理解是carotenoid 在动物的体内都是一样的稀少的，因此动物要么用它来抵抗病毒要么用吸引异性

同意。

但是不知道E为什么错，大家说说。

关于用来解毒的色素：

C：用来解毒的同时就不能用来提亮羽毛颜色了

E：可以特高被选择为配偶的可能性（=可以提高毛色亮度）

两个其实是矛盾的哟。