Three persons A, B and C invested their annual savings in a bank at 20% rate of simple interest per annum. If each of them gets an equal amount after 10, 15 and 20 years, respectively. Then the ratio of their initial investments is

A

20 : 15 : 12

B

16 : 12 : 7

C

25 : 23 : 19

D

12 : 15 : 19