A 64-year-old woman presents with transient right arm weakness and slurred speech lasting 20 minutes, now resolved. CT brain is normal. According to stroke prevention guidelines, which is the most appropriate next step?AReassure and review in 1 monthBArrange carotid imaging and start antiplatelet therapy promptlyCDelay antiplatelet therapy until MRI is doneDStart warfarin immediatelyENo further workup is required for a single transient eventCheck my answer