Concept:A force is a push or pull measured in newtons that can change the state of motion of an object.Explanation:I. Force is measured in newtons. Correct.II. Newton-metre measures torque/moment of force, not force itself. Incorrect.III. Force can start motion by making a stationary object move. Correct.IV. Force can change the direction of a moving body, such as in circular motion. Correct.Answer:C. I, III and IV only