A can do 20% of a work in 4 days, and B can do $$33\frac{1}{3}\%$$ of the same work in 10 days. They worked together for 9 days and then C completed the remaining work in 6 days. B and C together will complete 75% of the same work in:

A

12 days

B

9 days

C

11 days

D

10 days