How does a refill limitation help doctors who have prescribed medication to patients?

O A. It requires patients to return to the doctor to reevaluate their
continued need for the medication.
OB. It allows patients to refill their medication as many times as they
want, saving the doctor time.
O C. It requires doctors to prescribe a different medication after a
certain amount of time to reduce dependency.
O D. It doesn't allow patients to ever receive the medication again past
a certain number of refills.