A loudspeaker positioned above a tube makes the air in the tube resonate. A stationary wave is produced with two nodes and two antinodes, as shown. The speed of sound in air is $330\,\text{m s}^{-1}$. What frequency does the sound have?
- A$413\,\text{Hz}$
- B$550\,\text{Hz}$
- C$830\,\text{Hz}$
- D$1650\,\text{Hz}$