(d) all of these
Work Step by Step
The amount of blood reaching the skin, and the oxygenation level of that blood, both affect the color of the skin. Skin color is also determined by the amount of pigments such as melanin and carotene.
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.