A police car moves with a velocity of $30.0\,\text{m s}^{-1}$ directly towards an observer who is at rest. The car horn produces sound at a frequency of $2000\,\text{Hz}$. The speed of sound is $340\,\text{m s}^{-1}$. What is the frequency of the sound received by the observer?
- A$1840\,\text{Hz}$
- B$2000\,\text{Hz}$
- C$2180\,\text{Hz}$
- D$2190\,\text{Hz}$