Which of the following assessments could validate the report that two objects having the same mass collide head-on on a flat surface, each with a speed of 1.00 m/s relative to the surface, and rebound after the collision, each with a speed of 2.00 m/s relative to the surface?
a) Conservation of momentum is observed before and after the collision.
b) The total kinetic energy of the system remains constant before and after the collision.
c) Both objects experience an equal and opposite change in momentum during the collision.
d) All of the above.
