If internal energy of a box is U and the box is moving with some ve...

If internal energy of a box is U and the box is moving with some velocity, then which of the following is not to be included in U ?

A. Kinetic energy of the box

B. Translational kinetic energy of molecules of the gas

C. Rotational kinetic energy of molecules of the gas

D. Vibrational kinetic energy of the molecules of the gas