Marble A has a mass of 0.25 kg and moves 1.0 m/s to the right. It strikes the identical marble, B, which is at rest. Four students predict what will happen after the collision.

Predicted Results after Collision

Marble A
Marble B

Speed
Direction
Speed
Direction
Student A
2.0 m/s
Left
2.0 m/s
Left
Student B
0 m/s
None
1.0 m/s
Right
Student C
1.0 m/s
Left
1.0 m/s
Right
Student D
2.0 m/s
Left
0 m/s
None

Which student’s prediction is most likely correct?
Student A
Student B
Student C
Student D