A ball of weight 0.1 kg coming with speed 30 m/s strikes with a bat and returns in opposite direction with speed 40 m/s, then the impulse is (Taking final velocity as positive)

• A

  $-0.1\times \left(40\right)-0.1\times \left(30\right)$

• B

  $0.1\times \left(40\right)-0.1\times (-30)$

• C

  $0.1\times \left(40\right)+0.1\times (-30)$

• D

  $0.1\times (40)-0.1\times (20)$