Simplify the following expression $$\frac{45\div3\times\frac{2}{3}+1\frac{1}{3}of6\frac{3}{8}-4\frac{1}{8}}{\frac{1}{2}[(2\frac{1}{4}+1\frac{1}{2})\div(\frac{1}{15}+\frac{1}{3}-\frac{9}{10})]}$$

A

$$-\frac{4}{9}$$

B

$$-\frac{23}{6}$$

C

$$\frac{68}{5}$$

D

$$-\frac{8}{9}$$