Dr. Martin is an ophiologist, or a scientist who studies snakes. During one experiment, Dr. Martin fed a snake a whole mouse and compared the mass of the snake before it consumed the mouse to the snake's mass immediately after it was fed. According to the law of conservation of mass, how should the masses compare? A. The mass of the snake after feeding should be equal to the original mass of the snake plus the mass of the mouse. B. The mass of the snake after feeding should be equal to the mass of the mouse. C. The mass of the snake after feeding should be the same as the original mass of the snake. D. The mass of the snake after feeding should be equal to the original mass of the snake minus the mass of the mouse.