During the testing of a NetScaler high availability setup where two-factor authentication has been verified, new
user connections are failing due to authentication issues.
What should a Citrix Engineer do to resolve this issue?

A.
Ensure that the SSL Gateway VIP is resolvable in DNS.

B.
Ensure that the RADIUS server hostname is resolvable in DNS.

C.
Ensure that the NetScaler LDAP account has permission to view records in Active Directory.

D.
Ensure that the NSIP addresses of both NetScalers are configured as clients on the RADIUS server.