A 74-year-old man suddenly develops right-sided weakness and expressive dysphasia while at home. He presents to the emergency department 90 minutes after symptom onset. CT head excludes haemorrhage. What is the most appropriate next step?AStart Aspirin 300 mg and admit to stroke unitBOffer intravenous thrombolysis with AlteplaseCArrange carotid Doppler ultrasound and dischargeDStart Clopidogrel 75 mg onlyENo acute therapy, start rehabilitationCheck my answer