During an abdominal assessment, the nurse tests for a fluid wave. What condition would produce a positive fluid wave test?

A. Constipation: This involves hardened stool in the colon, causing localized distention but no free fluid. B. Splenomegaly: Enlargement of the spleen causes a palpable mass in the left upper quadrant but no free fluid. C. Distended bladder: This causes suprapubic distension but does not produce a fluid wave. D. Ascites: A positive fluid wave test indicates free fluid in the abdominal cavity, a hallmark sign of ascites. The test is performed by tapping one side of the abdomen and observing for a wave-like transmission of fluid to the opposite side.