Which of the Following Characterized Frontier Communities

Which of the following characterized frontier communities?

A) cooperation among neighbors as a form of insurance in a rugged environment.
B) communal households and a trend away from nuclear families and toward frontier polygamy.
C) deep suspicion of neighbors or any outsiders who were not kin.
D) widespread homosexuality because of a shortage of women on the frontier.
E) matriarchal leadership, because the men tended to be away from home for months at a time.