Exposition is the part of the plot structure that introduces the charachters and setting.
The correct asnwer is A) stinginess
because the actual definition is extreme unwillingness to spend money or use resources.
Since the speaker compares himself to a night owl and Wilson to an early bird without the usage of the words "like" or "as", this is an example of metaphor. The reader is obviously not actually a night owl, but is merely saying that he's more active at night.
