Determine the Most Appropriate Metric Unit to Go in the Blank

Multiple Choice

Determine the most appropriate metric unit to go in the blank. Choose from $\mathrm{km}, \mathrm{m}, \mathrm{cm}, \mathrm{mm}, \mathrm{L}, \mathrm{ml}, \mathrm{kg}$ , g, and $\mathrm{mg}$ .
-She took 500 of vitamin $C$ .

A) $\mathrm{mg}$
B) $\mathrm{kg}$
C) $g$
D) $\mathrm{L}$