A 55-year-old man presents with 20 minutes of right arm weakness and dysphasia that have fully resolved by the time he arrives in the emergency department. CT brain shows no haemorrhage. What is the most appropriate next step?ADischarge with reassuranceBStart aspirin and arrange urgent stroke specialist assessment and vascular imagingCStart anticoagulation immediately without further investigationsDDelay antiplatelets until MRI is availableENo secondary prevention is required once symptoms resolveCheck my answer