Final answer:
The best argument about the motion of a baseball hitting a can is that the baseball transfers its energy to the can, an example of an inelastic collision where momentum is conserved, but kinetic energy is not necessarily conserved in the same form.
Step-by-step explanation:
When a baseball hits a can, it can be best argued that B. The baseball transfers its energy to the can. According to the laws of physics, specifically the conservation of momentum, when two objects collide, the total momentum before the collision is equal to the total momentum after the collision if no external forces are involved. As the baseball, which is initially in motion, collides with the can, it comes to a stop, and the can begins moving. However, the total kinetic energy might not be conserved if the collision is inelastic, meaning some of the kinetic energy is transformed into other forms of energy, such as sound, heat, or deformation of the objects.
In the context of the question, the fact that Object A comes to rest and Object B starts moving implies an inelastic collision. This is because, for Object A to come to rest, some energy would typically have been converted into other forms, and not all kinetic energy would be retained in the motion of Object B.