Which of the Following Is a Characteristic of P-Waves

Multiple Choice

Which of the following is a characteristic of P-waves?

A) They compress and then expand the rock in the direction the wave travels.
B) They are generated near the surface and only compress the rock as they travel.
C) They travel slower than other seismic waves.
D) They displace the rock back and forth in a direction that is perpendicular to their travel direction.
E) They cannot be recorded on seismographs.