The correct answer is D. Endogamy
Step-by-step explanation:
In society, endogamy refers to practice and ideology that promotes the idea of marrying or interacting with only those that belong to the same group, this includes the same tribe or community, same social class, same family or same religious group. The purpose of this is to preserve the values, norms, and beliefs of a community as there would not be external influences. This is the opposite of exogamy in which individuals marry someone that is from another community or group. In the case of Oscar, it can be said his community is an example of endogamy because he is encouraged to marry someone within his cultural, economic and religious group which means this society promotes the idea of marrying members that belong to the same group.