Answer: Deindividuation
Explanation: Deindividuation is a concept in social psychology that is generally thought of as the loss of self-awareness in group, or groups
A and C are both correct to a degree. He is well known for his peculiar geometric forms in his paintings, which were not at all realism, but rather a style called cubism. During his Blue Period, his paintings were literally painted in blues, and were true to the answer in C. One particular painting depicts an elderly man playing a guitar with a frown on his face looking incredibly sad and upset. I would probably select C because it describes his Blue Period in contrast to his typical style, which is described in A.
They are called the concertino.
Well i know the greeks and romans used black backgrounds for their vases but i dont know if that is what you are looking for