Answer:
Hey there!
The answer is choice A, because there are more particles, so the chances of bumping into each other would be the greatest. Also, the cooler the object is, that is, in a solid, liquid, or gas state, the less the particles move, and the more they bump into each other. In fact, for solids, the particles touch each other at all times, which makes solids, well- solid.
Hope this helps :)
