How can you add an operator to an Incident Assignment Group?

A.
add the Incident Assignment Group name to the Operator Profile recordadd the Incident
Assignment Group name to the Operator? Profile record

B.
add the associated contact name to the Change Message Group Definition record

C.
add the Incident Assignment Group name to the Operator record

D.
add the associated contact name to the Incident Assignment Group Definition record

Explanation: