A.\(x \in \left\{ { 2;\,\,0\,} \right\}\).
B.\(x \in \left\{ { - 2;\,\,2\,} \right\}\).
C.\(x \in \left\{ { - 2;\,\,0\,} \right\}\).
D.\(x \in \left\{ { - 2;\,\,0;\,\,2} \right\}\).