An electron and a proton are held near each other. Which of the following correctly compares the magnitude of the gravitational and electric forces that the particles exert on each other for different separation distances? a The gravitational force is always less than the electric force. b The gravitational force is greater at small distances and less at large distances c The gravitational force is always greater than the electrie force d The gravitational force is less at small distances and greater at fange distances,