There correct answer is B!
If George's bike weighs 15 pounds, then we can say that because Obed's bike is 3 pounds heavier than George's, Obed's bike weighs 18 pounds. If Obed's bike weighs 18 pounds, then we can say that because Elsa's bike is twice as heavy as Obed's, Elsa's bike weighs 9 pounds.
The answer is C. Just took the quiz and B was wrong. It needs to be the one with the smaller 12.
Okaayyy
Set B has the greater mode
