How could the speed and direction of motion of an object be changed?

A) By increasing an object's inertia

B) By decreasing an object's inertia

C) By unbalanced forces acting on the object

D) By balanced forces acting on the object

C) By unbalanced forces acting on the object

Explanation:

Unbalanced forces can cause an object to change its motion.

If an object is at rest and an unbalanced force pushes or pulls the object, it will move. Unbalanced forces can also change the speed or direction of an object that is already in motion