Joel and Danny were playing a game with blue and red balls and a small white ball. The blue and red balls are exactly the same, except they are different colors. Joel rolled a blue ball at a speed of 5 m/s. It hit one of the red balls that was sitting still. What happened to the red ball once it was hit?
A. It rolled away at a speed less than 5 m/s.
B. It rolled away at speed of 5 m/s.
C. It remained sitting still.
D. It rolled away at a speed greater than 5 m/s.