As a result of a security site survey, the following is discovered:

An RF signal is available in the parking lot.
Six access points are found belonging to employees.
Static WEP keys are in use in the receiving department.
No security is being used on the access points in human resources.
Wireless VoIP clients in use do not support EAP-FAST.
There is no strong password policy in place.
EAP-Cisco Wireless (Cisco LEAP) is being used for wireless VoIP security.
All clients can support WPA.
VLANs are in use.

Based on these findings, what is recommended to enhance the security of the wireless VoIP network?

A.
enable static WEP on access points that are supporting wireless VoIP traffic

B.
create a separate management VLAN

C.
enable EAP-FAST authentication

D.
enforce a strong password policy