What is the value of the rational number which is the sum of the recurring decimals: $$0.\overline{6} + 0.\overline{7} + 0.\overline{8}$$

A

$$2\frac{1}{9}$$

B

$$2\frac{1}{3}$$

C

$$3\frac{1}{9}$$

D

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