A nurse in a pediatric clinic is providing teaching to the guardian of an infant who has a new prescription for digoxin. Which of the following manifestations should the nurse include as an indication of digoxin toxicity?

The correct answer is A: Bradycardia. Digoxin toxicity commonly presents with bradycardia due to its effect on slowing down the heart rate. Digoxin enhances parasympathetic activity, leading to decreased heart rate. Diaphoresis, jaundice, and polyuria are not typical manifestations of digoxin toxicity. Diaphoresis is excessive sweating, jaundice is yellowing of the skin or eyes due to liver issues, and polyuria is increased urination, none of which are directly related to digoxin toxicity. Therefore, A is the correct answer as it aligns with the expected manifestation of digoxin toxicity.