Which assessment technique provides the most useful data when the nurse is concerned about possible urinary retention?

A. Measure the girth of the client's lower abdomen: Measuring abdominal girth is more commonly used to monitor for ascites or general abdominal distention, not specifically for detecting urinary retention. B. Observe the appearance of the client's urine: Observing urine can provide information about infection or dehydration, but it does not directly assess the presence of retained urine in the bladder. C. Palpate the area above the pubic symphysis: Palpating above the pubic symphysis can detect bladder distention, providing direct, useful data for diagnosing urinary retention based on firmness and tenderness in that region. D. Auscultate an area six inches below the umbilicus: Auscultation is used to assess bowel sounds, not bladder fullness, and would not provide effective data for identifying urinary retention.