How can a Citrix Administrator provide two-factor authentication with tokens in a XenDesktop with NetScaler Gateway environment?

A. Create a SAML

IDP policy and bind it to the existing virtual server.

B. Configure a TACACS authentication policy and bind it to the existing virtual server.

C. Configure a RADIUS authentication policy and bind it to the existing virtual server.

D. Create an authorizatio

n policy and bind it to the existing virtual server.