What would be the easiest way to circumvent this and connect to the WLAN?

While probing an organization you discover that they have a wireless network. From your attempts to connect to the WLAN you determine that they are using MAC filtering by using ACLs on the access points. What would be the easiest way to circumvent this and connect to the WLAN?

A.
Steal a client computer and use it to access the wireless network

B.
Attempt to brute force the access point and update or delete the MAC ACL’s

C.
Attempt to crack the WEP key using Airsnort

D.
Sniff traffic off the WLAN and spoof your MAC address to the one that you have captured

Explanation:
The easiest way to gain access to the WLAN would be to spoof your MAC address to one that already exists on the network.