which list shows the numbers in oder from least to greatest?

a. 2.7×10^2, 2.7×10^-3, 7.2×10^-3

B. 2.7×10^-3, 2.7×10^-2, 7.2×10-3

C. 2.7×10^-3, 7.2×10^-3, 2.7×10^-2​