A 68-year-old man presents with fever, hypotension (BP 86/54 mmHg), tachycardia, and suspected pneumonia. Lactate is 4.5 mmol/L. According to CAEP sepsis guidelines, which initial management step is most critical within the first hour?AAdminister low-dose dopamine for renal protectionBBegin broad-spectrum IV antibiotics and aggressive IV crystalloid resuscitationCWait for culture results before starting antibioticsDRestrict fluids to avoid pulmonary oedemaEAdminister high-dose steroids to all patients with sepsisCheck my answer