A 48-year-old man presents with haematemesis and melena. He is hypotensive with blood pressure 88/52 mm Hg and tachycardic at 118 beats per minute. What is the most appropriate initial management step?AImmediate endoscopy without resuscitationBAggressive fluid resuscitation with intravenous crystalloids and blood products as neededCStart high-dose oral proton pump inhibitor and schedule outpatient endoscopyDAdminister oral iron and discharge homeENasogastric lavage only to confirm bleeding sourceCheck my answer