Which client requires the most immediate intervention by the nurse?

D A pregnant client with hyperemesis gravidarum who is receiving an infusion of Ringer's Lactate. C A young adult who experienced heat stroke and is receiving a normal saline intravenous (IV) fluid bolus. B A client with acute kidney injury who is somnolent and does not respond to verbal commands. A An older adult receiving enteral feedings via feeding tube who has a temperature of 100.6°F (38.1°C).