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已知集合 $M=\{x \mid-4 < x < 2\}, N=\left\{x \mid x^2-x-6 < 0\right\}$ ,则 $M \cap N=$
A. $\{x \mid-4 < x < 3\}$     B. $\{x \mid-4 < x < -2\}$     C. $\{x \mid-2 < x < 2\}$     D. $\{x \mid 2 < x < 3\}$         
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