Final answer:
The correct answer is Option C. Newton's third law of motion indicates that all forces occur in pairs with equal magnitude and opposite direction.
Step-by-step explanation:
Newton's third law of motion states that for every action, there is an equal and opposite reaction. This means that whenever one body exerts a force on a second body, the first body experiences a force that is equal in magnitude but opposite in direction to the force that it exerts. For example, when you sit on a chair, your body exerts a downward force on the chair (action), and the chair exerts an upward force on your body (reaction), which is of equal magnitude but in the opposite direction.