While performing an admission assessment on a patient, the nurse learns that the patient is taking ...

While performing an admission assessment on a patient, the nurse learns that the patient is taking furosemide (Lasix), digoxin, and spironolactone (Aldactone). A diet history reveals the use of salt substitutes.
 
  The patient is confused and dyspneic and complains of hand and foot tingling. Which is an appropriate nursing action for this patient?
  a. Contact the provider to request orders for an electrocardiogram and serum electrolyte levels.
  b. Evaluate the patient's urine output and request an order for intravenous potassium.
  c. Hold the next dose of furosemide and request an order for intravenous magnesium sulfate.
  d. Request an order for intravenous insulin to help this patient regulate extracellular potassium.