The nurse is providing child and family education prior to discharge following a cardiac catheterization. The nurse is teaching about signs and symptoms of complications. Which statement by the mother indicates a need for further teaching?

A. "The feeling of the heart skipping a beat is common."
B. "Strenuous activity should be limited for the next 3 days."
C. "We need to avoid a tub bath for the next 3 days."
D. "We need to watch for changes in skin color or difficulty breathing."