The answer is B.
An enema may be used to administer sodium polystyrene sulfonate (Kayexalate) for the treatment of hyperkalemia.
Kayexalate can be administered either orally or as an enema. Sodium polystyrene sulfonate is not absorbed from the gastrointestinal tract.
As the resin passes through the gastrointestinal tract, the resin removes the potassium ions by exchanging them for sodium ions.
Recent colon surgery, acute myocardial infarction, and suspected appendicitis are contraindications for administering an enema.
With elderly clients, enemas should be used with caution because of their higher risk of hyperphosphatemia, perforation, and sepsis.