When can Hide Mode not be used?

A.
Where the port number cannot be changed

B.
Where the port number can be changed

C.
Where the external server must distinguish between clients based on their IP address

D.
something else

Explanation:
Hide mode NAT can’t be used when the port number cannot change because hide mode changes
the source IP port to recognize the connections, also you can’t reach a host through the gateway
from the outside if you are applying Hide mode NAT to it. If you have one of this 2 cases you have
to use Static NAT.
Incorrect Answers:
B: If the port number can be changed, Hide mode NAT will work fine.
D: This will also make Hide Mode NAT to work.