The value of $$\frac{5}{6} \div \frac{5}{6}$$ of $$\frac{5}{6} \times 1\frac{2}{3} + \frac{3}{4} \div \frac{4}{3}$$ of $$1\frac{1}{2} - 1\frac{1}{2} -\frac{5}{6} \div \frac{3}{4}$$ is:

A

$$\frac{-17}{72}$$

B

$$\frac{-29}{18}$$

C

$$\frac{7}{8}$$

D

$$\frac{28}{9}$$