Find the value of $$3+\left\{1+\frac{1}{3}-(3-4\div3)+\frac{1}{4}+\frac{2}{3}\right\}$$

A

$$\frac{7}{3}$$

B

$$\frac{11}{12}$$

C

$$\frac{43}{12}$$

D

$$\frac{4}{3}$$