Stuart Has Successfully Cracked the WPA-PSK Password During His Wireless

Stuart has successfully cracked the WPA-PSK password during his wireless pen testing assignment. However, he is unable to connect to the access point using this password. What could be the probable reason?

A) It is a rogue access point
B) The access point implements another layer of WEP encryption
C) The access point implements a signal jammer to protect from attackers
D) The access point implements MAC filtering