Which Statement by the Student Indicates an Incorrect Understanding of Chest

Which statement by the student indicates an incorrect understanding of chest tubes?

A) "My client has a pneumothorax, so the chest tube will be high on the chest."
B) "Tidaling in the water seal chamber indicates a leak in the chest tube system."
C) "The amount of water in the water seal chamber actually controls the suction."
D) "Crepitus indicates that some air has escaped and is trapped in subcutaneous tissue."