A rubber ball of mass 100 g falls from a height of 4.90 m and after hitting the ground it rebounds to a height of 2.45 m. The impulse imparted to the ball by the ground if the time for which they are in contact was 0.2 s is
A1.67 N s
B2.38 N s
C3.34 N s
D0.84 N s