The nurse caring for a client admitted to the ED with chest pain. He reports that chest pain developed while mowing the lawn and he stopped and rested on the sofa, as is typical for him. This time the pain was not relived by rest so he came to the ED. The chest pain is relieved following administration of 2 sublingual nitroglycerin tablets. The nurse draws the conclusion about the client's status?
a. client most likely has stable angina
b. client has a knowledge deficit because he did not take his sublingual nitroglycerin
c. client most likely has unstable angina
d. client most likely has acute myocardial infarction