A tank of size 10 m × 10 m × 10 m is full of water and built on the ground. If g = 10 $m{s}^{-2}$, the potential energy of the water in the tank is

• A

  $5\times {10}^7$ J

• B

  1 × 10⁸ J

• C

  5 × 10⁴ J

• D

  5 × 10⁵ J