What Is the Highest Priority Health Teaching for a Client

What is the highest priority health teaching for a client who has taken an antidiarrheal medication?

A) Instruct the client to avoid taking sedatives or tranquilizers with the antidiarrheal.
B) Advise the client to consume all food with milk products until diarrhea ceases.
C) Advise the client that overuse of antidiarrheals may result in continuous diarrhea.
D) Instruct the client to withhold water and fluids until diarrhea has ceased.