The value of $$2\frac{1}{4}\div1\frac{1}{2} of \left[4\frac{1}{6}-\left(\frac{17}{21}+\frac{4}{3}\times2\frac{1}{8}\div1\frac{1}{6}of\frac{3}{4}-\frac{5}{7}\right)\right]$$ is:

A

$$3\frac{1}{3}$$

B

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

C

$$\frac{5}{9}$$

D

$$1\frac{4}{5}$$