A 68-year-old with nonvalvular atrial fibrillation (CHA₂DS₂‑VASc = 3 for age 65-74, HTN, diabetes) and normal renal function asks about stroke prevention. What is the guideline‑preferred approach?ANo antithrombotic therapy is needed at CHA₂DS₂‑VASc 3 in menBAspirin 81 mg daily aloneCWarfarin with target INR 1.5-2.0DDirect oral anticoagulant at standard dose unless contraindicatedEDual antiplatelet therapy (aspirin + clopidogrel) as an alternative to anticoagulationCheck my answer