How did Cisco solve the PAT translation issue?

How did Cisco solve the PAT translation issue?

A.
change the IKE TCP port number from a well known to a dynamically assigned port number

B.
wrap a standard IKE packet with a UDP port number

C.
wrap a standard IPSec packet with a UDP port number

D.
change the IPSec TCP port number from a well known to a dynamically assigned port number