Gaokao Math Practice Question
已知集合 $A=\left\{x \mid x^{2}-x-2>0\right\}$, 则 $C_{R} A=（ \qquad ）$
- A.$\{x \mid-1<x<2\}$
- B.$\{x \mid-1 \leqslant x \leqslant 2\}$
- C.$\{x \mid x<-1\} \cup\{x \mid x>2\}$
- D.$\{x \mid x \leqslant -1\} \cup\{x \mid x \geqslant 2\}$
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