A mass of 100 g strikes the wall with a speed of 5 m s-1 at an angle as shown in figure and it rebounds with the same speed. If the contact time is 2 × 10-3 s, what is the force applied by the wall?
A 
N to right
B 250 N to right
C N to left
D 250 N to left
The options are royally messed up.