A company finished deploying an 802.11g wireless mesh. The administrator receives a call from a user who is unable to connect to the company wireless, though all network configurations are centrally managed. Which of the following is MOST likely causing the connection problem?

A.
The access point has omni-directional antennas.

B.
The end user is using an 802.11a wireless card.

C.
The access point is not broadcasting the SSID.

D.
The end user is using an 802.11b/g wireless card.