A 68-year-old man on a medical ward has a NEWS2 score of 8, newly increased from 2 earlier in the day. He is tachypnoeic, tachycardic and requiring new supplemental oxygen. According to NEWS2 guidance, what is the most appropriate response?ARequest immediate emergency assessment by a critical care outreach or equivalent teamBIncrease observations to 12-hourly and review in the morning ward roundCAsk the healthcare assistant to repeat the observations in 4 hoursDPrescribe an oral antibiotic and review in 24 hoursEDocument the score and take no further action because he is already in hospitalCheck my answer