A nurse is caring for a client diagnosed with end-stage renal disease (ESRD) that reports having shortness of breath and swelling in the lower extremities. The nurse assesses that the client has crackles in the lungs and an elevated blood pressure. The nurse should suspect which of the following conditions based on the client's symptoms?

A. Hyperkalemia: Elevated potassium levels can occur in ESRD and may cause cardiac dysrhythmias or muscle weakness, but they do not typically cause lung crackles, peripheral edema, or shortness of breath. B. Hypoxemia: Low oxygen levels may lead to shortness of breath, but they are a symptom rather than a cause in this scenario. The presence of fluid overload signs suggests a more specific underlying issue. C. Hypervolemia: Fluid overload is common in ESRD due to reduced kidney function. Symptoms such as crackles, peripheral edema, hypertension, and dyspnea point to excess intravascular volume. D. Hypovolemia: Presents with symptoms such as decreased blood pressure, increased heart rate, poor skin turgor, and dry mucous membranes. The client's elevated blood pressure and lower extremity swelling are contradictory to the signs and symptoms of hypovolemia.