A 68-year-old man presents with sudden right-sided weakness and expressive dysphasia that started 90 minutes ago. CT head excludes haemorrhage and shows no early infarct changes. He has no contraindications. What is the most appropriate next step?AStart aspirin 300 mg onlyBOffer intravenous thrombolysis with AlteplaseCStart high-dose statin and delay thrombolysis for 24 hoursDArrange carotid Doppler ultrasound firstEDischarge with urgent TIA clinic follow-upCheck my answer