A nurse is preparing to administer digoxin to a client who has heart failure. Which of the following actions is appropriate?

A. The apical pulse should be measured for a full 1 minute, not just 30 seconds, before administering digoxin. B. Nausea, vomiting, and anorexia are early signs of digoxin toxicity, so evaluating the client for these symptoms is appropriate. C. Clients on digoxin should consume potassium-rich foods to prevent hypokalemia, which increases the risk of digoxin toxicity. D. Digoxin is usually withheld if the heart rate is below 60 bpm, not above 100 bpm. Tachycardia (heart rate >100) is not a reason to withhold digoxin.