A 70-year-old man with nonvalvular atrial fibrillation has a CHA₂DS₂-VASc score of 3 (age 70, hypertension, diabetes). He has no contraindications to anticoagulation. What is the most appropriate management to reduce his risk of stroke?AAspirin 81 mg daily alone.BNo antithrombotic therapy is needed.COral anticoagulation with a direct oral anticoagulant.DDual antiplatelet therapy with aspirin and clopidogrel.ELeft atrial appendage occlusion device in all such patients.Check my answer