求牛牛帮助解答，谢谢

beefn00dle

12. GWD21-Q12:
Birds known as honeyguides exhibit a unique pattern of behavior:  the bird leads another animal, such as a honey-badger or a human, to a bees’ nest with their chattering when they fly ahead; after the larger animal takes honey, the bird eats the wax 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

cx_ding

首先排除代词不一致的A E。
接下去就不太懂了，请教牛牛。
如果我选的话，好像这里的and并列结构有问题，排除B D。
我选C

taner

我觉得as应到时间状语从句，也就是说在飞的时候chattering.也只能在飞的时候引人过去。逻辑考察。