Two Balls of Equal Mass Are Thrown with Equal Velocities

Multiple Choice

Two balls of equal mass are thrown with equal velocities against a massive wall. The first rebounds with a speed equal to its striking speed, and the second sticks to the wall. The impulse that the first ball transmits to the wall, relative to the second, is

A) twice as great.
B) half as great.
C) the same.
D) four times as great.
E) one-fourth as great.