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 selectiveB.people’s short-term memory lasts for no more than two hoursC.some audience have difficulty in adapting to the speaker’s presentation styleD.listeners are often egocentricE.the speaker fails to express ideas fluently and clearly正确答案：people’s auditory perception is always selective；listeners are often egocentric