Which of the following underlined parts is different in pronunciation from the others?

A．Please focus your attention on your papers, boys and girls.

B．She likes to show off her new clothes in front of her friends.

C．I think she should improve her learning methods.

D．The boy picked a hole in his new sweater.

若某小型信息系统开发团队由4人组成，则其沟通渠道数为（）。

A.12

B.10

C.8

D.6