What three ratios are equivalent to 3/9?

A. 1/3, 2/3, 3/3
B. 1/3, 12/36, 15/45
C. 6/9, 12/15, 18/21
D. 5/12, 9/12, 3/12

The three ratios that are equivalent to 3/9 are 1/3, 12/36, 15/45. Therefore, the correct answer is B.