Your client has a brand new laptop. He is trying to connect to his home network, which is using an older (802.11b) wireless router. The router is set for encryption but not MAC filtering. What is the most likely problem?

A.
His physical address for the laptop is not in the router.

B.
His laptop is using the WPA encryption protocol.

C.
The laptop does not have a wireless NIC.

D.
His laptop has a newer operating system that cannot communicate with the router.