A 54-year-old man with a history of peptic ulcer disease presents with large-volume haematemesis and melena. He is pale, clammy, BP 86/50 mmHg, pulse 124/min. What is the single most appropriate immediate management step?AArrange urgent endoscopy before resuscitationBInsert a nasogastric tube and lavageCBegin ABCDE assessment and aggressive intravenous crystalloid resuscitationDGive oral Omeprazole 40 mgEDischarge with outpatient endoscopyCheck my answer