A User of the Wireless Network Is Unable to Gain

A user of the wireless network is unable to gain access to the network. The symptoms are: 1.) Unable to connect to both internal and Internet resources 2.) The wireless icon shows connectivity but has no network access The wireless network is WPA2 Enterprise and users must be a member of the wireless security group to authenticate. Which of the following is the MOST likely cause of the connectivity issues?

A) The wireless signal is not strong enough
B) A remote DDoS attack against the RADIUS server is taking place
C) The user's laptop only supports WPA and WEP
D) The DHCP scope is full
E) The dynamic encryption key did not update while the user was offline