Earthquake waves are classified as P waves and S waves. Which of the following statements is true about these waves?
A. The P wave is transverse as is the S wave.
B. The P wave is longitudinal as is the S wave.
C. The P wave is transverse and the S wave is longitudinal.
D. The P wave is longitudinal and the S wave is transverse.
E. Both the P and S waves are mixtures of longitudinal and transverse waves.
Answer: D
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