A moving van and a small car are traveling in the same direction on a two-lane road. The van is moving at twice the speed of the car and overtakes the car. The driver of the car sounds his **** (frequency = 440 Hz) to signal the van that it is safe to return to the lane. Which is the correct statement?
(A) The car driver and van driver both hear the **** frequency as 440 Hz.
(B) The car driver hears 440 Hz, but the van driver hears a lower frequency.
(C) The car driver hears 440 Hz, but the van driver hears a higher frequency.
(D) Both drivers hear the same frequency and it is lower than 440 Hz.
