Order the five metric units from smallest to largest: meter, centimeter, millimeter, micrometer, kilometer. Which of the following correctly arranges the units in order from smallest to largest?
A) kilometer, meter, centimeter, millimeter, micrometer
B) micrometer, millimeter, centimeter, meter, kilometer
C) centimeter, millimeter, micrometer, meter, kilometer
D) millimeter, centimeter, micrometer, meter, kilometer