He is described as “a thin young man with a brown face, with brown eyes and a head of tightly curled hair” which is why he is called Curley. Curley is described as dressing in a somewhat aristocratic way, as if to separate himself from the lowly ranch hands. The glove is to keep his hand soft for his wife. Curley is the boss's son, and because his father only appears once, Curley is the main representative in the novella of the land-owning class. When this revenge plan fails and he loses face, Curley picks a fight with the vulnerable Lennie to reassert his status.
The answer is not A, because it is not clear enough. Who's we? The answer is not B, the sentence is not clear about the building they are visiting. The answer is not C, it's not clear about what building they are talking about. So your answer is D.
