Simplify the following expression.
$$9\frac{1}{5}\div\left\{\left(16\frac{1}{5}\div\overline{12\frac{2}{3}-9\frac{2}{3}}\right)+17\frac{1}{2} of 3\frac{1}{21}\right\}$$

A

$$\frac{139}{881}$$

B

$$\frac{137}{881}$$

C

$$\frac{140}{881}$$

D

$$\frac{138}{881}$$