At the onset of a XenDesktop 7.5 with NetScaler Gateway 10.5 proof-of-concept, users report they are unable to access desktop and server OS machines.
Which configuration might be preventing users from accessing desktop and server OS machines?

A.
Single-hop DMZ with StoreFront

B.
Double-hop DMZ with StoreFront

C.
Single-hop DMZ with Web Interface

D.
Double-hop DMZ with Web Interface