A nurse is caring for a client who has a chest tube in the pleural space. The nurse notices continuous bubbling in the water seal chamber of the client's drainage system. Which of the following actions should the nurse take?

A. Continuous bubbling in the water seal chamber typically indicates an air leak. Clamping the tubing briefly and sequentially along its length helps identify the location of the leak. This is an appropriate nursing action. B. Raising the drainage system to chest level is incorrect and can cause backflow of fluid or air into the pleural space, increasing the risk of pneumothorax. C. Squeezing the tubing is not a recommended practice and can cause increased intrathoracic pressure or damage the drainage system. D. The collection chamber is not emptied; instead, the entire drainage system is replaced when full to maintain sterility and function.