A Primary Care Physician Has Ordered a High Enema for a Patient

A primary care physician has ordered a high enema for a patient admitted for constipation. When administering the high enema, a nurse will

A) Insert the tip of the tubing a minimum of 8 inches to make certain that feces contained above the sigmoid colon will be removed.
B) Instill at least 1000 mL normal saline heated to 120°F to promote peristalsis but decrease the discomfort of cramping.
C) Insert the tip of the tubing 4 inches while the patient sits on the toilet to aid elimination by use of gravity.
D) Instill half of the ordered solution while the patient lies on the left side, then reposition the patient to supine and then right lateral side-lying position to instill the rest of the solution.