I learned to listen for the sound the chain makes when it 's too loose . Eventually I felt confident enough to drive down to Oriental Bay to go for a ride . The homework was an hour to an hour and a half of hills . Under the circumstances I decided to ignore the hill part of the homework .

Based on the preceding passage, choose your answer for question What may be the reason why they learned to listen for a sound ?
Available options: (A). Because they read it online .; (B). Because their bike has been broken for a while .; (C). Because they have really good hearing .; (D). None of the above choices .;
The answer is:
(B).