The graph illustrates how the displacement of an air particle changes with time as a progressive sound wave moves through the air. The speed of sound in air is $330\,\text{m s}^{-1}$. What wavelength does the wave have?
- A$6.6\,\text{m}$
- B$8.3\,\text{m}$
- C$20\,\text{m}$
- D$25\,\text{m}$