The shaded region in the figure represents the $\ldots \ldots \ldots$ inequality.

• A
  $x \geq 0, y \geq 0$
• B
  $x \leq 0, y \geq 0$
• C
  $x > 0$ and $y > 0$
• D
  $x \geq 0$ and $y \leq 0$