What could be the reason?

Tom is troubleshooting NAT issues using fw monitor and Wireshark. He tries to initiate a
connection from the external network to a DMZ server using the public IP which the firewall
translates to the actual IP of the server. He analyzes the captured packets using Wireshark
and observes that the destination IP is being changed as required by the firewall but does
not see the packet leave the external interface. What could be the reason?

A.
The translation might be happening on the client side and the packet is being routed by
the OS back to the external interface.

B.
The translation might be happening on the server side and the packet is being routed by
OS back to the external interface.

C.
Packet is dropped by the firewall.

D.
After the translation, the packet is dropped by the Anti-Spoofing Protection.