The expansion of large-scale farming in Africa and Asia has destroyed

Background: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.

Premise:As a result, farmers have lost millions of dollars worth of crops annually.

Conclusion: Yet even if elephant sanctuaries were created on a widespread basis to guarantee elephants sufficient natural vegetation, the raiding would likely persist,

Reason for the conclusion :since __________________.

A. when elephants forage for food, they typically travel in herds. irrelevant. just told us the characteristic of the elephant.
B. Foraging elephants have been known to cause substantial damage even to plants that they do not eat. seems relevant, but still can't explain the point why they come to cropland but not just stay in wild.
C. Some of the land where crops have suffered extensive damage from elephants has been allowed to return to its natural state. irrelevant, told us nothing about the reason why elephant would raid the crops
D. Elephants tend to prefer cultivated crops to wild vegetation as a food source. That told us why elephant would continue to raid the crops because they like it much than wild vegetation.
E. Elephant sanctuaries are usually created in areas that are rich in the natural vegetation on which elephants have historically depended. Weaken, this option told us that elephant should more likely to eat in wild, not to raid the crops.
E. Elephant sanctuaries are usually created in areas that are rich in the natural vegetation on which elephants have historically depended. Weaken, this option told us that elephant should more likely to eat in that place, not to raid the crops.