Considering Newton's three laws of motion, what is Law of Inertia?
A
An object will maintain its state of rest or uniform motion unless acted upon by an external force.
B
The force acting on an object is equal to its mass multiplied by its acceleration.
C
For every action, there is an equal and opposite reaction.
D
The gravitational force between two objects is proportional to their masses and inversely proportional to the square of the distance between them.