Which of these sequences lists units of astronomical measurement from smallest to largest?

A. light-year --> AU --> kilometer --> mile
B. light-year --> AU --> mile --> kilometer
C. kilometer --> mile --> AU --> light-year
D. mile --> kilometer --> AU --> light-year

C. kilometer --> mile --> AU --> light-year

Explanation:

Option C is the right because kilometer is the smallest unit in the given options. Mile is a greater unit than a kilometer and the Astronomical unit is greater than miles. The light-year is the largest one.

1 km = 0,621 miles

1 mile = 1,07578e-8 Astronomical unit (AU)

1 AU = 1,58125e-5 light year