A Nurse Gives a Patient Discharge Instructions About How to Store

A nurse gives a patient discharge instructions about how to store nitroglycerin sublingual tablets to keep the medication fresh for use at all times.Since nitroglycerin is easily destroyed,the nurse would tell the patient to store the medication in which way?

A) In plastic or a tight cardboard box
B) With cotton over the top of the medication
C) In a dark glass bottle out of the sunlight
D) In the refrigerator tightly closed