A nurse is providing teaching to a client who has angina pectoris and a new prescription for nitroglycerin sublingual tablets. Which of the following statements by the client indicates an understanding of the teaching?

A. "I’ll dial 911 if I still have pain after taking 3 nitroglycerin tablets 5 minutes apart.": The client should take one nitroglycerin tablet every 5 minutes for up to three doses. If pain persists after the third dose, the client should call 911, as it may indicate a heart attack or severe angina. B. "I’ll dial 911 if 1 nitroglycerin tablet does not relieve my pain, and then take up to 2 more tablets 5 minutes apart while waiting.": The client should not take more than 3 tablets in a 15-minute period. After the third dose, the client should immediately call 911. C. "I’ll dial 911 if I still have pain after taking 4 nitroglycerin tablets over a 20-minute period.": Taking more than 3 nitroglycerin tablets in a 15-minute period is not recommended. If pain persists after the third tablet, the client should call 911. D. "I’ll dial 911 when I have pain and then take the nitroglycerin tablets.": The correct sequence is to take a nitroglycerin tablet first, wait 5 minutes, and if pain continues, take another tablet. Calling 911 should only occur if pain persists after the third dose.