the answer is C. thinking about a problem constantly
Newton's laws of motion relate an object's motion to the forces acting on it. In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration
It means the completion or approval of a finished and definitive version of something.
Just list some areas you'd like to imporve on physical fitness and readiness for testing your abilities