There are two networks sharing the same office space. One network already has an 802.11g a

There are two networks sharing the same office space. One network already has an 802.11g accesspoint. The second network acquires one as well. If known, which of the following would help keep the two networks from interfering with each other?（）

A.Channel

B.WEP key

C.Pre-shared key

D.Encryption type