If $A = \{ x : x \text{ is an integer and } x^2 - 9 = 0 \}$,$B = \{ x : x \text{ is a natural number and } 2 \leq x < 5 \}$,and $C = \{ x : x \text{ is a prime number } \leq 4 \}$,then $(B - C) \cup A$ is:

  • A
    $\{ -3, 3, 4 \}$
  • B
    $\{ 2, 3, 4 \}$
  • C
    $\{ 3, 4, 5 \}$
  • D
    $\{ 2, 3, 5 \}$

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