A and B alone can do a work in 24 days and 32 days, respectively. A starts the work and worked alone for first 3 days and then B joined A. B and A together do the work for next 3 days and then another person C joined both. If the total work was completed in 13 days, then in how nay days A and C together can complete the work together?
A)12 days B)16 days C)15 days D)10 days E)18 days