Final answer:
A nurse should expect abdominal cramping as a symptom for a client with a sodium level of 123 mEq/L, which indicates hyponatremia.
Step-by-step explanation:
A nurse caring for a client with a sodium level of 123 mEq/L should expect symptoms associated with hyponatremia, a condition where the sodium levels in the blood are lower than normal. In this case, the most likely finding would be Abdominal cramping (Option A), which is a common symptom of hyponatremia along with nausea, headache, confusion, and fatigue. Options B (Visual fields), C (Visual acuity), and D (Pupil clarity) are more related to vision tests and are not directly associated with sodium levels in the blood.