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.