Which configuration step (if any) is necessary to enable FTP inspection on TCP port 2121?

Which configuration step (if any) is necessary to enable FTP inspection on TCP port 2121?

A.
None. FTP inspection is enabled by default using the global policy.

B.
Create a new class map to match TCP port 2121, then edit the global policy to inspect FTP for traffic matched by the new class map.

C.
Edit default-inspection-traffic to match FTP on port 2121.

D.
Add a new traffic class using the match protocol FTP option within the inspect_default class map.