Which of the Following Should Be Included in Instructions to Prepare

Which of the following should be included in instructions to prepare a patient for a colonoscopy?

A) The back of the throat is sprayed with a local anesthetic to inhibit the gag reflex
B) Explain that the colon must be cleansed before the procedure and to expect diarrhea and mild cramping
C) Take a series of tablets containing a contrast agent the night before the test, followed by a high-fat substance
D) A liquid solution of barium is taken during the procedure after having nothing to eat or drink after midnight
E) Instruct the patient not to eat meats or vegetables for 1 to 3 days before the test