Which Intervention Would Most Likely Reduce the Risk of Adverse

Which intervention would most likely reduce the risk of adverse effects from medications?

A) advising patients to take the drugs on a continuous schedule.
B) telling the patient to write down side effects after finishing the prescription.
C) encouraging a patient to call the physician or nurse prior to taking each dose of the medication.
D) obtaining a list of all prescription and over-the-counter drugs and herbal supplements the patient is taking.