Which of the following is a cause for the network problems?

Users report network problems with the 802.11g wireless network whenever the phone rings. Which of the following is a cause for the network problems?

A.
A digital phone is being used.

B.
The access point is broadcasting the SSID.

C.
A 2.4GHz cordless phone is being used.

D.
A 5GHz cordless phone is being used.