How can we know that a moving object is in equilibrium?

A.If the moving body changes its velocity, it is in equilibrium. If the body doesn't change its velocity, it is not in equilibrium.

B.If the moving body doesn't change its velocity, it is in equilibrium. If the body changes its velocity, it is not in equilibrium.

C. If the moving body undergoes constant acceleration, it is not in equilibrium. If the body changes its acceleration, it is in equilibrium.

D If the moving body undergoes constant acceleration, it is in equilibrium. If the body changes its acceleration, it is not in equilibrium