A scrub jay can remember when it cached a particular piece of food in a particular place,researchers have discovered, and tend not to bother to recover a perishable treat if stored long enough to have rotted.

A. tend not to bother to recover a perishable treat if

B. they tend not to bother recovering a perishable treat

C. tending not to bother to recover a perishable treat it

D. tends not to bother recovering a perishable treat

E. tends not bothering to recover a perishable treat it

在答案A和D之间游荡，徘徊，不解，绝望...........

题干有点乱。。。