Oh nice oc! I could never make an oc like that
The answer to your question is D.
Light sources can be coming into any angle of the piece of work. it can make the contrast different completely, and make the piece darker or lighter.
Explanation:
Commedia dell'arte, a traditional Italian form of physical comedy, uses masks and often they appear in Elizabethan and Restoration comedies, where a character might use one as disguise. In Greek theatre the actors all wore exaggerated masks to communicate character.