Birds known as honeyguides exhibit a unique pattern of behavior: the bird leads another animal, such as a honey-badger or human, to a bees’ nest with their chattering when they fly ahead; after the larger animal takes honey, the bird eats the was and bee larvae.

A. with their chattering when they fly

B. with chattering and its flying

C. by chattering as it flies

D. by chattering and its flying

E. by chattering as they are flying

这道题的答案是C,请问这道题的考点是什么,该怎么下手?