What evidence is there that marker ink is a mixture?

If you do a paper chromatography using marker ink, the result will produce different colors. This indicates the different components used in making the marker ink. Chromatography is a separation process that takes advantage of the difference of the movements of the components in a mixture.

D. most models represent a real world object in a simpler way

Idon’t know sorry i don’t know the answer i’m s sorry