By default which TCP port needs to be opened on the external firewall to allow an Internetbased client to reach the Internet DMZ relay?

A.
Port 80 inbound to the relay with return traffic allowed

B.
Port 52311 inbound to the relay with return traffic allowed

C.
Port 80 inbound to the relay with return traffic allowed / outbound to the client with return
traffic allowed

D.
Port 52311 inbound to the relay with return traffic allowed / outbound to the client with
return traffic allowed