In a way, the title of the novel is ironic. Gatsby is not even the character's real name; he is called James Gatz, and decides to change his name because he wants to reinvent himself and his life. He is also not exactly "great". He has many flaws. He values the superficial things that characterize the society at the time--money, greed, thoughtlessness.
However, he does create the illusion of being a great person living an amazing life, and that is how others perceive him. He puts on a show, and the title "The Great Gatsby" also reflects the theatrical nature of his life.
B would be the best choice.
Stoicism because the word itself means to endure hardships or pain without showing emotion or anything.
