A 29-year-old woman delivers vaginally at term and then has heavy vaginal bleeding estimated at 1200 mL within 30 minutes. Her uterus is boggy on palpation. What is the most appropriate first-line management step for this postpartum haemorrhage?AAdminister intravenous tranexamic acid onlyBBegin uterine massage and administer oxytocinCTake her immediately to the operating theatre for hysterectomyDStart high-dose corticosteroidsEObserve as uterine atony usually resolves spontaneouslyCheck my answer