A nurse is preparing to report laboratory results to the provider for a client who is taking clozapine.For which of the following findings does the nurse anticipate a prescription to discontinue clozapine?

Choice A rationaleMagnesium level of 2.5 mEq/L is slightly above the normal range (1.3 to 2.1 mEq/L) but does not necessitate discontinuation of clozapine, as it does not indicate a serious adverse effect.Choice B rationalePotassium level of 5.4 mEq/L is marginally elevated above the normal range (3.5 to 5 mEq/L) but is not a critical concern for discontinuing clozapine, which is more closely monitored for hematologic effects.Choice C rationaleA WBC count of 2,500/mm³ is significantly below the normal range (5,000 to 10,000/mm³). Clozapine can cause agranulocytosis, a severe decrease in white blood cells, necessitating immediate discontinuation.Choice D rationaleSodium level of 134 mEq/L is slightly below the normal range (136 to 145 mEq/L) but does not require discontinuation of clozapine. This mild hyponatremia can be monitored and managed without stopping the medication.