The position-time graph of a body of mass 0.04kg is shown in the figure. The time between two consecutive impulses received by the body and the magnitude of each impulse is

• A

  4 sec, 4x10^-4 kgm/ s

• B

  2 sec, 8x10^-4 kgm / s

• C

  6 sec, 4x10^-4 kgm/ s

• D

  8 sec, 8x10^-4 kgm / s