A dog takes 4 leaps for every 5 leaps of a hare. If one leap of the dog is equal to 3 leaps of the hare, the ratio of the speed of the dog to that of the hare is :
Choose the most appropriate option.
A) 12 : 5
B) 4 : 3
C) 9 : 5
D) 9 : 1
E) 9 : 2

Rationale: "explanation : dog : hare = ( 4 * 3 ) leaps of hare : 5 leaps of hare = 12 : 5 . answer : a ) 12 : 5"
Answer: A