The correct option is B Change in the mass of a body.
A force acting on a body can change its state of motion. It can change the speed or direction of motion of a body. If the force is acting in the direction of motion, the body speeds up and if the force is acting opposite to the direction of motion, the body slows down. A force acting at some angle changes the direction of motion. However, the mass of an object can not be changed by applying a force.