First, Gatsby sends someone to mow Nick's lawn and work on the landscaping so that it looks better for when Daisy gets there. He also has dozens of fresh flowers sent to Nick's. In his own house next door, he turns all of the lights on so that Daisy will hopefully be impressed by it. Finally, he dresses 'comfortably', but in impressive clothes. He does all of this so that Daisy will be impressed by his wealth and hopefully fall in love with him again.
a pattern of behavior that is unusual but has become accepted
Well, we know that setting is location and surroundings, usually! Irony/sarcasm doesn't apply here, as it's usually in the form of dialogue or much more than those statements.Even if you were confused about tragic resolution, you know enough that there isn't anything particularly 'tragic' nor 'resolving' about this excerpt. So characterization seems best fit, giving an idea on the individual and their attire and how they are interacting with the other! But please, you're free to interpret it yourself in any case if doubtful upon my own.
The answer would be A. Appropriate comparisons
Thoreau, Gandhi and Mandela actions reflect the spirit of optimism because each person thought of the future by the actions they took they had hope that the outcome they took would be positive.