Final answer:
Discuss questions about sexual activity with your healthcare provider because sexual activity may be limited by your heart damage.
Step-by-step explanation:
The nurse should respond to the client by saying, "Discuss questions about sexual activity with your healthcare provider because sexual activity may be limited by your heart damage." This response is the best choice because it acknowledges the client's concern and directs them to seek guidance from their healthcare provider. It is important for individuals with heart damage to consult their healthcare provider to ensure their safety and well-being when engaging in sexual activity.