Evidence to support the fact that Earth's central core is solid can be attributed to
A) a decrease in S-wave velocity as they encounter and move through the inner core.
B) an increase in P-wave velocity as they encounter and move through the inner core.
C) a decrease in P-wave velocity as they encounter and move through the inner core.
D) an increase in S-wave velocity as they encounter and move through the inner core.
Answer: B
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