A 72-year-old man arrives with hypotension (MAP 58 mmHg), lactate 5 mmol/L, suspected pneumonia, and mottled extremities. After blood cultures, what is the next best immediate step?AAdminister vasopressin as first-line vasopressorBStart norepinephrine after waiting for 1 L crystalloid responseCGive 30 mL/kg IV crystalloid rapidly and start broad-spectrum antibiotics as soon as possibleDRestrict fluids and start phenylephrineEDelay antibiotics until WBC results returnCheck my answer