What must a network administrator configure on ClearPass to enable RADIUS authentication with a network access device (NAD)? (Choose two.)
A. An NTP server needs to be set up on the NAD.
B. The ClearPass server certificate must be installed on the NAD.
C. A shared secret must be configured on the ClearPass server and NAD.
D. The ClearPass server must have the network device added as a valid NAD.
E. A bind username and bind password must be provided.