A client reports a 2-day history of fever, vomiting, and diarrhea. The healthcare provider prescribes serum electrolyte levels to be obtained. Which laboratory results should the nurse expect?

A Serum potassium: 3.5 mEq/L, serum sodium: 142 mEq/L C Serum potassium: 5.0 mEq/L, serum sodium: 138 mEq/L B Serum potassium: 4.5 mEq/L, serum sodium: 140 mEq/L D Serum potassium: 3.0 mEq/L, serum sodium: 149 mEq/L