A bus driving along at 39.6 kmph is approaching a person who is standing at the bus stop, while honking repeatedly at an interval of 30 seconds. If the speed of the sound is 330 m/s, at what interval will the person hear the horn ?
(A) 31 seconds
(B) 29 seconds
(C) 30 seconds
(D) the interval will depend on the distance of the bus from the passenger
