Dividing by 3⁄9 and then multiplying by 5⁄6 is the same as dividing by what number?  Choose one
A) 31 ⁄ 5
B) 16 ⁄ 5
C) 20 ⁄ 9
D) 5 / 2
E) 5 ⁄ 16

Rationale: "say x / 3 / 9 * 5 / 6 = x * 9 / 3 * 5 / 6 = x * 5 / 2 d"
Answer: D