A 73-year-old woman with atrial fibrillation on Warfarin presents with melaena and dizziness. Her blood pressure is 88/50 mmHg, pulse 110/min and she looks pale and sweaty. What is the most appropriate immediate management step?AArrange an urgent outpatient endoscopyBGive intravenous Omeprazole and discharge once symptoms settleCGive 1 L of 0.9% sodium chloride rapidly and arrange urgent senior reviewDStop Warfarin but no other interventions are neededEPrescribe oral iron and arrange GP follow-upCheck my answer