单项选择题

You had 8 people In your project，one more person will be joining next week．You know that once the new person joins，the number of communication channels will increase by______．

A．No change in number of communication channels
B．8
C．12
D．20

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单项选择题

In an appropriate communication model between a sender and a receiver．all the following statements are correct EXCEPT：

A．Noise should be minimize
B．Receiver must decode and reply back to the messag
C．Receiver should acknowledge and agree with the message sent by the sende
D．Sender must choose right way to send the message

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