If a Body Moves in Such a Way That Its

Multiple Choice

If a body moves in such a way that its linear momentum is constant,then

A) its kinetic energy is zero.
B) the sum of all the forces acting on it must be zero.
C) its acceleration is greater than zero and is constant.
D) its center of mass remains at rest.
E) the sum of all the forces acting on the body is constant and nonzero.