In Fermi’s method for estimating large numbers, he uses a power of 10 to estimate the upper and lower bound. Which answer choice contains powers of 10?
A. 1, 2, 3, 4, …
B. 10, 20, 30, 40, …
C. 10, 100, 1,000, 10,000, …
D. 5, 10, 15, 20, …
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