$A$ ball is released from a height $h$. If $t_{1}$ and $t_{2}$ are the times required to complete the first half and the second half of the distance respectively,then choose the correct relation between $t_{1}$ and $t_{2}$.

• A
  $t_{1} = \sqrt{2} t_{2}$
• B
  $t_{1} = (\sqrt{2}-1) t_{2}$
• C
  $t_{2} = (\sqrt{2}+1) t_{1}$
• D
  $t_{2} = (\sqrt{2}-1) t_{1}$