A Patient Who Had a Segmental Left Lung Resection for Treatment

A patient who had a segmental left lung resection for treatment of a lung carcinoma returns from surgery with a left posterolateral chest tube attached to a disposable water-seal chest drainage system. Which signs would indicate that the drainage system is working properly?

A) Air is bubbling in the water-seal chamber.
B) The fluid level in the water-seal chamber fluctuates.
C) The fluid level in the drainage chamber remains constant.
D) The bubbling in the suction chamber is intermittent.