A mass of 2 kg traveling at 3 m/s undergoes a one-dimensional elastic collision with a group of four 1-kg masses that are at rest in contact with each other and lined up in the same direction as the velocity of the 2-kg mass. As a result of the collision
A) the 2-kg mass comes to a stop and two of the 1-kg masses take off at 3 m/s.
B) the 2-kg mass comes to a stop and one of the 1-kg masses takes off at 6 m/s.
C ) the 2-kg mass and the five other masses travel at 1 m/s.
D) the 2-kg mass comes to a stop and all four of the 1-kg masses take off at 2 m/s.
E) the 2-kg mass comes to a stop and three of the 1-kg masses take off at 2 m/s.