A 72-year-old man with sudden onset left-sided weakness and slurred speech 90 minutes ago is brought to a stroke-capable hospital. CT brain shows no haemorrhage. There are no contraindications to thrombolysis. What is the most appropriate next step?AStart aspirin 300 mg and admit to stroke unit onlyBAdminister IV alteplase according to protocol and arrange for stroke unit careCDefer thrombolysis and repeat CT in 24 hoursDStart therapeutic low-molecular-weight heparin immediatelyEArrange urgent carotid Doppler ultrasound before treatmentCheck my answer