The nurse in the emergency department is assessing a 64-year-old client experiencing substernal chest pain. The client’s electrocardiogram shows evidence of myocardial ischemia. Which statement should indicate to the nurse that the client may be a candidate for thrombolytic therapy ？（）
A．"I have had chest pain for 2 days. "
B．"My chest pain started 3 hours ago. "
C．"My chest pain stops when I take a nitroglycerin pill. "
D．"I have had chest pain on and off all week. "
