When assessing a multigravida on the first postpartum day, the nurse finds a moderate amount of lochia rubra, with the uterus firm, and three fingerbreadths above the umbilicus. What action should the nurse implement first?

Choice A is correct because a distended bladder can displace the uterus and prevent it from contracting properly, leading to increased bleeding and risk of infection. The nurse should check for a distended bladder and assist the client to empty it if needed. Choice B is incorrect because reviewing the hemoglobin is not a priority action. The hemoglobin may not reflect the current blood loss and may be done later. Choice C is incorrect because massaging the uterus is not necessary if it is firm. Massaging a firm uterus can cause overstimulation and pain. Choice D is incorrect because increasing intravenous infusion is not a priority action. The client may not need additional fluids if the bleeding is moderate and the vital signs are stable.