A and B can do a certain work in 12 and 18 days, respectively. They work together for 5 days. The remaining work was completed by C alone in $$27\frac{1}{2}$$ days. What part of the same work can be completed by A, Band C together in 6 days?

A

$$\frac{5}{6}$$

B

$$\frac{9}{10}$$

C

$$\frac{14}{15}$$

D

$$\frac{29}{30}$$