Why are the access points receiving the wrong IP information?

Refer to the exhibit.

A customer has enabled the primary DNS server to return the correct controller IP address in response to a CISCO-CAPWAP-CONTROLLER.localdomain request coming from new access points associating to the wireless network. The access points seem to still be receiving the wrong IP address and cannot associate to the primary controller.

Why are the access points receiving the wrong IP information?
A . The DHCP option 43 has an incorrect controller IP address configured.
B . The DNS server must be configured to respond to CISCO-LWAPP-CONTROLLE
C . localdomain request.
D . The controller and wireless action point need to be Layer 2 adjacent.
E . The controller must be configured for DHCP option 15 request.

Answer: A