18 ANSWER 

D) Muscle weakness

Explanation

The normal calcium level is 9.0-11.0 mg/dL, making this client hypercalcemic. Muscle weakness is a key feature of hypercalcemia due to alterations in excitable membranes. This occurs as a complication in some clients with cancer. Peaked T waves, muscle spasm, and increased gastric motility are signs of hyperkalemia. The core issue of the question is knowledge of electrolyte imbalance (hypercalcemia in this case) and the associated manifestations. Recall that calcium plays a key role in nervous system function to help guide you to the correct option.