When earthquakes occur, seismic waves are sent through the Earth. The two most common types of seismic waves are P waves and S waves. The graph below shows how P waves and S waves can travel through the Earth.
Based on the graph, what is true about P waves and S waves?
A. They both travel faster than 7,000 miles per minute
B. They travel at different speeds through the Earth.
C. They both travel slower than 1,000 miles per hour.
D. They travel at the same speed through the Earth.
PLEASE HELP!!