Which Precaution Is Important to Teach an Older Patient Who

Which precaution is important to teach an older patient who is prescribed methimazole (Tapazole) ?

A) "If you miss a dose,go to the nearest emergency department and get an injection of methimazole."
B) "Be sure to wear sunscreen and a hat whenever you go outside into the sunshine."
C) "Drink at least 3 L of fluid daily while taking this drug."
D) "Avoid contact with crowds or anyone who is ill."