A Citrix Engineer must provide a group of non-administrator help-desk personnel with access to a set of features in the

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A Citrix Engineer must provide a group of non-administrator help-desk personnel with access to a set of features in the XenMobile Console.
What should the engineer do to accomplish this task?

A. Configure AAA groups on the NetScaler Gateway. Allow only these groups to access the console over port 4443.
B. Create a local group on the XenMobile Server. Allow only access for help-desk personnel.
C. Configure a Delivery Group within the XenMobile Server and deploy the security policies only to the dedicated group of help-desk personnel.
D. Configure Role-based Access Control (RBAC) and assign only the desired permissions to the Active Directory group in which the help-desk personnel reside.