24-7 Which of the following most logically completes the argument below?

The expansion of large-scale farming in Africa and Asia has destroyed much of the natural vegetation on which elephants have historically depended, forcing them to turn to cultivated land to satisfy their enormous appetites. As a result, farmers have lost millions of dollars worth of crops annually. Yet even if elephant sanctuaries were created on a widespread basis to guarantee elephants sufficient natural vegetation, the raiding would likely persist, since

(A) when elephants forage for food, they typically travel in herds.

(B) foraging elephants have been known to cause substantial damage even to plants that they do not eat.

(C) some of the land where crops have suffered extensive damage from elephants has been allowed to return to its natural state.

(D) elephants tend to prefer cultivated crops to wild vegetation as a food source

(E) elephant sanctuaries are usually created in areas that are rich in the natural vegetation on which elephants have historically depended.

偶觉得D有点牵强，意思应该是“一旦大象吃过了庄稼以后，就还会再想办法去吃”。不过这样也还是有漏洞，就是题目没有说明这些sanctuaries是什么样的形式，因为如果这些sanctuaries是和庄稼地分开的，而且有很好的围墙，那么大象也不可能再回去吃啊？奇怪！

请指教

"Which of the following most logically completes the argument below?"

It's not asking for a perfect sentence to complete the passage. You only need to select the most logical one from the given choices.