Two trucks of equal mass behave like rigid bodies. If a head-on collision between the two trucks is assumed to be perfectly elastic, which option BEST describes the post-collision situation?
A) The slower trucks reverses direction but maintains the same speed.
B) The trucks exchange their speeds and reverse their direction of motion.
C) Both trucks start to move in the direction of the truck with higher speed.
D) The faster truck slows down to the speed of the slower truck but continues in the same direction.