The value of $$\frac{5}{8}\div(\frac{8}{11}\times2\frac{3}{4}\div\frac{4}{9})+5\frac{1}{3}\div(5\frac{1}{4}\div\frac{3}{8}\times\frac{3}{7})$$ of $$1\frac{7}{9}$$ is:

A

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

B

$$\frac{1}{4}$$

C

$$\frac{23}{36}$$

D

$$\frac{5}{18}$$