The sum of money at compound interest amounts to thrice itself in 3 years. In how many years will it be 9 times itself?	Choose the most appropriate option:
A) 7	B) 1	C) 8	D) 6	E) 9
100 ---- 300 --- 3   900 --- 3   ----   6 years   Answer:6
<result>D</result>
The sum of money at compound interest amounts to thrice itself in 3 years. In how many years will it be 9 times itself?