What is the simplified value of $$\left[\left\{\left(3-\frac{2}{1+\frac{1}{4+\frac{2}{3}}}\right) of 1\frac{13}{21}\div3\frac{2}{7}\right\}-\frac{1}{3}\right]\times\frac{9}{10}$$?

A

1

B

2

C

$$\frac{1}{5}$$

D

$$\frac{3}{10}$$