Tính \(\mathop {\lim }\limits_{x \to  - {3^ - }} f\left( x \right) = \mathop {\lim }\limits_{x \to  - {3^ - }} \frac{{2x + 7}}{{x + 3}}.\)

A. \(\mathop {\lim }\limits_{x \to  - {3^ - }} f\left( x \right) =  - \infty .\)

B. \(\mathop {\lim }\limits_{x \to  - {3^ - }} f\left( x \right) = \frac{7}{3}.\)

C. \(\mathop {\lim }\limits_{x \to  - {3^ - }} f\left( x \right) = 2.\)

D. \(\mathop {\lim }\limits_{x \to  - {3^ - }} f\left( x \right) =  + \infty .\)