question: A 78-year-old man with a history of coronary artery disease and an asymptomatic reducible inguinal hernia requests an elective hernia repair. You explain to him that valid reasons for delaying the proposed surgery include
opa: Coronary artery bypass surgery 3 months earlier
opb: A history of cigarette smoking
opc: Jugular venous distension
opd: Hypertension