6. Two identical spheres are moving toward each other with the same speed, '01, and collide elastically, headon. Justify your evaluation of the validity of each of the following claims. After the collision A. both spheres move in opposite directions with final speeds that are greater than 111, because each sphere is accelerated by the force exerted by the other sphere. B. both spheres move in opposite directions with the same speed vi, because otherwise momentum would not be constant. AW Skills in Action C. both spheres move in opposite directions with the same speed vi, because otherwise mechanical energy would not be constant. D. both spheres move in opposite directions with the same speed vi, because otherwise mechanical energy and momentum will not remain constant