When an earthquake occurs, two different types of waves are generated. These waves are called P waves and S waves. Examine the diagram, which shows how the waves travel through Earth. Which statement provides the best evidence of Earth’s structure, based on the information in the diagram?
A. The bending of S-waves shows that Earth has both an outer and an inner core.
B. Earthquakes provide no information because they cannot be detected all over Earth.
C. S-waves do not travel through liquids, so the evidence shows that Earth has an outer core layer made of liquid.
D. P-waves do not travel through liquids, so the evidence shows that Earth has an outer core layer made of liquid.