Scenario: An administrator implemented RADIUS with NetScaler Gateway as a two-factor authentication solution for a XenDe

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Scenario: An administrator implemented RADIUS with NetScaler Gateway as a two-factor authentication solution for a XenDesktop implementation. A planned outage is scheduled in wake of a software upgrade on the RADIUS infrastructure. During the outage, the administrator needs to disable the two-factor authentication on NetScaler Gateway to enable users' continued access to published applications.Which action could the administrator take to meet the needs of the scenario without affecting the connected users?

A. Delete the RADIUS authentication policy.
B. Set the RADIUS policy to be secondary authentication.
C. Disable authentication on the NetScaler Gateway virtual server.
D. Unbind the RADIUS authentication policy from the NetScaler Gateway virtual server.