A body is moving with uniform velocity of 8 ${\mathrm{ms}}^{-1}$. When the body just crossed another body, the second one starts and moves with uniform acceleration of 4 ${\mathrm{ms}}^{-2}$. The time after which two bodies meet will be:

• A

  2 s

• B

  4 s

• C

  6 s

• D

  8 s