A nurse is assessing a client who has preeclampsia and received a dose of calcium gluconate to treat magnesium sulfate toxicity.Which of the following findings should the nurse identify as an indication that calcium gluconate was effective?

Choice A rationaleA respiratory rate of 12/min indicates that the respiratory depression caused by magnesium sulfate toxicity has been effectively reversed by calcium gluconate. Normal respiratory rate in adults is 12-20 breaths per minute.Choice B rationaleAbsent deep tendon reflexes indicate ongoing magnesium sulfate toxicity. Calcium gluconate administration should restore normal reflexes, not cause their absence.Choice C rationaleSlurred speech is a sign of magnesium sulfate toxicity. Effective treatment with calcium gluconate should improve neurological function and resolve symptoms like slurred speech.Choice D rationaleA urine output of 22 mL/hr is below the normal range and suggests renal impairment or ongoing toxicity. Effective treatment should result in an increase in urine output to within the normal range (greater than 30 mL/hr).