The incomes of A, B and C are in the ratio 7 ∶ 9 ∶ 12 and their expenditures are in the ratio 8 ∶ 9 ∶ 15. If A's saving is one-fourth of his income, then the ratio of savings of A, B and C is

• A. 56 ∶ 99 ∶ 69
• B. 99 ∶ 56 ∶ 69
• C. 69 ∶ 56 ∶ 99
• D. 99 ∶ 69 ∶ 56