A college has a total of 1400 seats for the three courses A, B, C. There is an increase in seats by 40%, 50% and 75% respectively in the courses A, B, C. If the ratio of the seats in these courses prior to the increase is 5:7:8, then the difference of the number of seats in courses C and A after increase is equal to

A

The number of seats of A prior to increase

B

The number of seats of A after increase

C

the number of seats of B after increase

D

the number of seats of C after increase