What Is the Definition of Newton's First Law of Motion

What is the definition of Newton's first law of motion?

A) To every action there is always an opposite and equal reaction.
B) The change in motion is proportional to the force impressed and is made in the direction of the straight line in which that force is impressed.
C) A body remains in a state of rest unless it is compelled to change that state by forces impressed on it.
D) Forces responsible for equilibrium are concerned with a normal joint movement pattern.