A person tries to lift a stone by using a lever. If the lever arm is constant and the mass of the stone increases, what is true of the torque necessary to lift it? A. It decreases because the torque is inversely proportional to the mass of the body. B. It increases because the torque is directly proportional to the mass of the body. C. It decreases because the torque is directly proportional to the mass of the body. D. It increases because the torque is inversely proportional to the mass of the body