A 72-year-old man presents to the ED with fever, confusion, tachycardia 122/min, BP 82/48 mm Hg, RR 26/min, SpO₂ 93% on room air. Lactate is 5.2 mmol/L and suspected source is pneumonia. What is the most appropriate immediate management step?AAdminister 30 mL/kg IV crystalloid bolus (e.g., lactated Ringer's) promptlyBStart norepinephrine immediately without fluidsCBegin low-dose dopamine for renal perfusionDDelay antibiotics until two sets of blood cultures after fluid resuscitation is completeERestrict fluids to 10 mL/kg because of pulmonary edema riskCheck my answer