Which method should be used to create a custom role in vCloud Director?

Which method should be used to create a custom role in vCloud Director?

A.
Rename and modify the rights assigned to a default role using the Roles and Rights tab.

B.
Copy an existing role and modify privileges on the Administration tab.

C.
Modify a default role by editing its attributes in the vCloud Director database.

D.
Import and rename a custom role defined in vCenter Server.