A,B,C,D and E are five persons to complete jobs X and Y. Line graph shows the data regarding the number of days taken by these persons to complete the job X and Y.

If the ratio of the number of days for which D and C worked on job Y is 12:5 and completed the work then find the difference between number of days for which C and D worked.

Options

A. 7
B. 14
C. 21
D. Can't be determined