A 66-year-old patient presents within 4 hours of a high-risk TIA (ABCD₂ score 6). CT head is normal. What secondary prevention is most appropriate now?AStart aspirin alone and continue indefinitelyBStart clopidogrel alone and continue indefinitelyCStart dual antiplatelet therapy with aspirin and clopidogrel for 21 days, then continue single antiplateletDStart ticagrelor plus aspirin for 12 monthsEDefer antiplatelet therapy until MRI is doneCheck my answer