Probably the Most Widely Used In-Office or At-Home Occult Blood $\mathrm{C}$

Probably the most widely used in-office or at-home occult blood test is the Hemoccult II. The patient has come to the clinic because he thinks there is blood in his stool. When you reviewed his medications, you noted he is on antihypertensive drugs and NSAIDs for early arthritic pain. You are sending the patient home with the supplies necessary to perform 2 hemoccult tests on his stool and mail the samples back to the clinic. What instruction would you give this patient?

A) Take all your medications as usual.
B) Take all your medications except the antihypertensive medications.
C) Dont eat highly acidic foods 72 hours before you start the test.
D) Avoid vitamin $\mathrm{C}$ for 72 hours before you start the test.