What can a Citrix Administrator do to prevent users from viewing this message?

Scenario: While attempting to access web server that is load balanced by a Citrix ADC using HTTPS, a user receives the message below.

SSL/TLS error: You have not chosen to trust “Certificate Authority” the issuer of the server’s security certificate.

What can a Citrix Administrator do to prevent users from viewing this message?
A . Ensure that users have the certificate’s private key.
B . Ensure that users have the certificate’s public key.
C . Ensure that the server certificate is linked to its respective intermediate and root certificates.
D . Ensure that users have the server certificate installed.

Answer: B

Explanation:

Reference: https://docs.citrix.com/en-us/citrix-gateway/12-1/citrix-gateway-12.1.pdf (80)