Two 020-Kg Balls, Moving at 4 M/s East, Strike a Wall

Multiple Choice

Two 0.20-kg balls, moving at 4 m/s east, strike a wall. Ball A bounces backwards at the same speed. Ball B stops. Which statement correctly describes the change in momentum of the two balls?

A) $\left|\Delta \overrightarrow{\mathbf{p}}_{\mathrm{B}}\right|<\left|\Delta \overrightarrow{\mathbf{p}}_{\mathrm{A}}\right|$ .
B) $\left|\Delta \overrightarrow{\mathbf{p}}_{B}\right|=\left|\Delta \overrightarrow{\mathbf{p}}_{\mathrm{A}}\right|$ .
C) $\left|\Delta \overrightarrow{\mathbf{p}}_{\mathrm{B}}\right|>\left|\Delta \overrightarrow{\mathbf{p}}_{\mathrm{A}}\right|$ .
D) $\overrightarrow{\mathbf{p}}$ B = $\Delta$$\overrightarrow{\mathbf{p}}$ A.
E) $\overrightarrow{\mathbf{p}}$ B > $\Delta$$\overrightarrow{\mathbf{p}}$ A.