What Is Newton's Second Law of Motion

What is Newton's Second law of motion?

A) A body continues in a state of rest or uniform motion in a straight line unless made to change that state by forces acting on it.
B) Every mass exerts a force on any other mass that is proportional to the product of the masses divided by the square of the distance between them.
C) Force equals mass times acceleration, F=ma.
D) When two bodies interact, they create equal and opposite forces on each other.