The velocities of two arbitrary points A and B on a rigid body are vA and vB, respectively. Which statement is correct（）

A. If the rigid body is in translation, then ½vA½=½vB½ must be satisfied

B. If ½vA½=½vB½ is satisfied, then the rigid body must be in translation

C. If the rigid body is in translation, then ½vA½=½vB½ must be satisfied and the directions of the two velocities could be different

D. If the rigid body is in translation, then the directions of vA and vB must be the same but probably |vA|¹|vB