Final answer:
The answer to the succinct statement of Newton's Third Law in three words is 'Both A and B', as both 'Action equals Reaction' and 'Reaction equals action' correctly represent the law.
Step-by-step explanation:
A succinct statement of Newton's Third Law in three words is 'Action equals Reaction'. Therefore, the correct answer to the question is C. Both of the above. Newton's Third Law states that for every action, there is an equal and opposite reaction, meaning the forces exerted by two bodies on each other are always equal in magnitude but opposite in direction. These forces are described as action-reaction pairs, and they act on different bodies, ensuring they do not cancel each other out. This principle of symmetry in nature is fundamental in analyzing the origin of forces and understanding which forces are external to a system.