A user is trying to connect to a new access point with a laptop. The laptop is already able to connect to older access points. The user can see the SSID, but the new access point will not allow the user to connect. The user verifies the correct password is being used. Recently issued devices are able to connect to the new access point. Which of the following is the BEST way to restore this situation?
A. Enable DHCP on the wireless network
B. Disable the firewall on the laptop
C. Upgrade the radio firmware
D. Clear the DNS cache on the laptop