The value of $$8 \div 2 of 3 - [56 \div 4 of \left\{4 \times 3 - (9 - 11) \div (2 \div 4 of 4)\right\}]$$ is:

A

$$\frac{11}{6}$$

B

$$\frac{5}{6}$$

C

$$\frac{4}{3}$$

D

$$\frac{1}{2}$$