Simplify 2 - \left[\frac{1}{2} + \frac{1}{4} + \frac{1}{6} \div \left(\frac{3}{4} - \frac{1}{2}\right)\right].

A

$$\frac{7}{12}$$

B

$$\frac{1}{12}$$

C

$$\frac{17}{12}$$

D

$$\frac{11}{12}$$