What is one reason that many critics argue that psychologists should not be given the right to ...

What is one reason that many critics argue that psychologists should not be given the right to directly prescribe medications to their psychotherapy clients?
A) Psychiatrists already have that privilege and therefore to give these privileges to psychologists would be redundant.
B) Psychologists training does not provide the knowledge for appropriately understanding the drugs potential effects.
C) Psychopharmacotherapy has not proven to be as effective as the various psychotherapies.
D) Drug companies will provide free samples that will get into the hands of drug addicts if we allow psychologists to prescribe directly.