Why Is the Use of Self-Help Books Not Recommended by Your

Why is the use of self-help books not recommended by your textbook authors for the treatment of mental illnesses?

A) because many such books offer quick-fixes that are not realistic and they fill the reader with false hope
B) because there has never been a self-help book that has been found to be even remotely effective at helping people with psychological difficulties
C) because the use of self-help books makes it harder for therapists to get clients and sustain their businesses
D) because a person does not have to have any real qualifications to write a self-help book