A nurse is assessing a client who has heart failure and is taking digoxin. Which of the following manifestations should the nurse report to the provider as an indication of digoxin toxicity?

The correct answer is A: Vomiting. Digoxin toxicity can lead to gastrointestinal symptoms such as nausea, vomiting, and anorexia. Vomiting is a common early sign of digoxin toxicity and should be reported to the provider promptly. Dilated pupils (B) are not typically associated with digoxin toxicity. Bruising (C) and peripheral edema (D) are not specific manifestations of digoxin toxicity. It's important to monitor for other signs of toxicity such as vision changes, confusion, and cardiac arrhythmias.