A study of ischemic heart disease analyzes cases of individuals hospitalized with acute chest pain in which myocardialinfarction was documented at autopsy. The gross and microscopic appearances of the hearts are correlated with the degree of coronary atherosclerosis and its complications, clinical symptoms, and therapies given before death. Hemorrhage and contraction bands in necrotic myocardial fibers are most likely to be seen with infarction in which of the following settings? (A) Acute vasculitis (B) Angioplasty with stent (C) Coronary thrombosis (D) Septic embolization (E) Thrombolytic therapy