A 62-year-old man presents to the emergency department with pleuritic chest pain and dyspnoea 24 hours after a long-haul flight. He has tachycardia and mild hypoxia. His Wells score for PE is 7 (PE likely). What is the most appropriate next step?AArrange D-dimer testing and await results before treatmentBDischarge with safety-netting and arrange outpatient CTPACStart therapeutic LMWH (or DOAC) and arrange immediate CTPA imagingDStart prophylactic-dose LMWH and review in 24 hoursEOrder a V/Q scan and await results without anticoagulationCheck my answer