You are building the rules of your new firewall. You wish to allow only (Internal) access to smtp email on the Internet (External). You wish for all other traffic to be disallowed. Which of the following rules will you have to implement to make this happen?

A.
Direction: Inbound, Protocol: TCP, Source IP: Internal, Destination IP: External, Source Port: 25, Destination Port: >=1024, Action: Allow.

B.
Direction: Outbound, Protocol: TCP, Source IP: External, Destination IP: Internal, Source Port: 25, Destination Port: >=1024, Action: Allow.

C.
Direction: Outbound, Protocol: TCP, Source IP: Internal, Destination IP: External, Source Port: >=1024, Destination Port: 25, Action: Allow.

D.
Direction: Inbound, Protocol: TCP, Source IP: External, Destination IP: Internal, Source Port: 25, Destination Port: >=1024, Action: Allow.

E.
Direction: Inbound, Protocol: SMTP, Source IP: Internal, Destination IP: External, Source Port: 25, Destination Port: >=1024, Action: Allow