Gl illnesses cause symptoms of anorexia, vomiting and diarrhea. What lab value should the nurse monitor related to volume depletion?

A. Carcinoembryonic Antigen (CEA): CEA is a tumor marker used to track colorectal cancer, not volume depletion. B. B12 Level: B12 is affected by long-term absorption issues, not acute volume loss. C. Electrolyte Imbalance: Vomiting and diarrhea can cause loss of sodium, potassium, and chloride, leading to fluid and electrolyte imbalances, which are critical to monitor. D. Lipase: Lipase is used to diagnose pancreatitis, not associated with fluid volume status.