A 72-year-old postoperative patient following hip replacement becomes tachycardic (HR 120/min), hypotensive (BP 85/50 mmHg) and confused. His NEWS2 score is 8. What is the most appropriate immediate response?AIncrease oral fluids and recheck in 4 hoursBCommence ABCDE assessment with high-flow oxygen, IV access and urgent senior reviewCOrder routine blood tests for the morning ward roundDGive a sedative for agitation and observeEDischarge to the ward day room for mobilisationCheck my answer