Question 1140161
15500(1+.15)^10=62706.14 interest is 47706.14
17000(1+.15/4)^40=74126.44 interest is 57126.44
18500(1+.15/2)^20=78585.25 interest is 60585.25
multiple compounding produces more interest for the same amount of principal.

The second is the best.  The third has more interest because the initial principal was greater.