A patient with ST-segment elevation MI has ongoing chest discomfort. Fibrinolytic therapy has been ordered. Heparin 4000 units IV bolus was administered, and a heparin infusion of 1000 units per hour is being administered. ASA was not taken by the patient because he had a history of gastritis treated 5 years ago. What is the next action?

a) Administer clopidogrel
b) Continue with heparin infusion
c) Administer aspirin
d) Initiate nitroglycerin infusion