The picture below shows a seismic tomography image of the western United States.What is the relative temperature of the blue regions (darker grey regions not outlined in black) versus the red regions (darker grey regions outlined in black) ? 
A) The blue regions are warmer than the red regions.
B) The red regions are colder than the blue regions.
C) The red regions are warmer than the blue regions.
D) The colors are not indicative of temperature, only velocity.
Correct Answer:
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