A sound wave in a solid is shown as a sequence of lines. The diagram indicates compressions $C$ and rarefactions $R$ at a particular moment. Which statement is correct?
- AAll particles on one line move in the same direction at the same time.
- BThe direction of travel of the sound wave is parallel to the lines.
- CThe distance between a compression and its adjacent rarefaction is a wavelength.
- DThe pattern of lines represents a transverse wave.