C) Chloroplast should be your answer.
The most important characteristic of plants is their ability to photosynthesize.
As epithelial makes the outer covering of all the organs and skin is also made of epithelial...so to be sure that it does not get depleted or destroyed due to friction and other external cause ...it should be highly generative !
They both describe each other so it would make some sense that they would name the color after it ♀️
Check it’s answer on internet