Which two statements about the RBAC security mechanism are true? (Choose two)

A.
The roleadd command uses the same default shell as useradd.

B.
The roleadd command updates the user_attr file when it adds a role to the system.

C.
The -p option, used to associate an account with a profile, can only be used with roleadd.

D.
Using usermod -R rolename username updates the user_attr file to associate a user with a role.