Answer: B) a person who moves away from his or her home country
Step-by-step explanation:
From the excerpt, we are informed that "Along with several other American writers and artists of the time, Hemingway was a well-known expatriate".
An expatriate, who's also referred to as an ex-pat, is a person who is living in another country or moves away from his or her country to work in another country.
Therefore, the correct option is B.