What is causing the problem?

A network administrator has configured source NAT, translating to an address that is on a locally connected subnet. The administrator sees the translation working, but traffic does not appear to come back.What is causing the problem?

A.
The host needs to open the telnet port.

B.
The host needs a route for the translated address.

C.
The administrator must use a proxy-arp policy for the translated address.

D.
The administrator must use a security policy, which will allow communication between the zones.