A male college student is brought to an emergency clinic by his friends because they report that he has been vomiting for the past two days as a result of food poisoning. Laboratory findings indicate that the client's potassium level is 2.5 mEq/L (2.5 mmol/L), so he is admitted to a local hospital. Which intervention is most important for the nurse to include in this client's plan of care?

C Assess level of consciousness every 4 hours. D Instruct client on dietary intake of potassium-rich foods. B Inject prescribed potassium chloride IV push slowly. A Monitor client's electrocardiogram continuously.