The ratio of the ages ofa man and his wife is 4: 3. After 4 years, this ratio will be 9: 7. If fat the time of marriage, the ratio was 5:3; then how many years ago were they married?
A8 years
B10 years
C12 years
D15 years
A8 years
B10 years
C12 years
D15 years
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