It is difficult for the audience to take in the message exactly the same as what the speaker intends to deliver because（）。

A.people’s auditory perception is always selective

B.people’s short-term memory lasts for no more than two hours

C.some audience have difficulty in adapting to the speaker’s presentation style

D.listeners are often egocentric

E.the speaker fails to express ideas fluently and clearly

正确答案：people’s auditory perception is always selective；listeners are often egocentric