Only one of the statements below uses the term theory in its correct, scientific sense. Which one?
A) I have a new theory about the cause of earthquakes, and I plan to start testing it soon.
B) I wrote a theory that is 152 pages long.
C) Einstein's theory of relativity has been tested and verified thousands of times.
D) Evolution is only a theory, so there's no reason to think it really happened.
Answer: C