The Nurse in the Intensive Care Unit Is Caring for a Client

The nurse in the intensive care unit is caring for a client who is postoperative from a cardiac surgery.  The client has a mediastinal chest tube.  During assessment, the nurse notes bubbling in the suction control chamber.  Which nursing action is appropriate?

A) Assess the insertion site for presence of subcutaneous emphysema
B) Notify the surgeon of a large air leak
C) Take no action as the chest tube is functioning appropriately
D) Turn down the wall suction until the bubbling disappears