How would you set up the authentication method?

Your company’s Security Policy forces users to authenticate to the Gateway explicitly, before they can use any services. The Gateway does not allow Telnet service to itself from any location. How would you set up the authentication method? With a:

A.
Client Authentication rule, using partially automatic sign on

B.
Session Authentication rule

C.
Client Authentication for fully automatic sign on

D.
Client Authentication rule using the manual sign-on method, using HTTP on port 900

E.
User Authentication rule