A can complete $$\frac{3}{8}$$ of a certain work in 9 days and B can complete 80% of the same work in 16 days. Both work together for 5 days. C alone completes the remaining work in $$6\frac{1}{2}$$ days. A and C together will complete the whole work in:

A

9 days

B

10 days

C

8 days

D

6 days