C is the reasonable answer.
Oil paint because it has the consistency of pigments mixed with drying oil (commonly linseed oil). The oil paint drys more slowly which makes it more easy to blend each color together & provided a softer merging of one tone into the next, becoming a well used tool to artist.
Using all of it at times and only small parts of it at others..... not fully certain
Answer:
I think the answer is B. if I'm wrong then I'm sorry
