GATT1994最惠国待遇原则的特点是（）。

A.多边化、制度化、无条件

B.多边化、无例外

C.无条件、制度化、无例外

D.无条件、无例外

A client with a pneumothorax receives a chest tube attached to a Pleur-evac. The nurse notices that the fluid of the second chamber of the Pleur-evac isn’t bubbling. Which nursing assumption would be most invalid（）

A. The tubing from the client to the chamber is blocked.

B. There is a leak somewhere in the tubing system.

C. The client’s affected lung has reexpanded.

D. The tubing needs to be cleared of fluid.