Here are four decimal numbers:
0.84, 0.8, 0.81, 0.639
Choose the list that shows the numbers in order from smallest to largest.
A. 0.639, 0.8, 0.81, 0.84
B. 0.81, 0.639, 0.84, 0.8
C. 0.84, 0.81, 0.8, 0.639
D. 0.639, 0.8, 0.84, 0.81