How Are Self-Help Groups Different Than Group Therapy

How are self-help groups different than group therapy?

A) Self-help groups are more expensive than group therapy.
B) Self-help groups are not led by professional therapists while group therapy is led by a trained therapist.
C) Self-help groups can focus on several different problems within in a group more effectively than group therapy.
D) Self-help groups are nondirective while group therapy is directive.