●Adding 5 people to a 4 person team increases the communication channels by a factor of （7

●Adding 5 people to a 4 person team increases the communication channels by a factor of (75).

(75) A. 3 times

B. 4 times

C. 5 times

D. 6 times

请帮忙给出正确答案和分析，谢谢！