The Arapesh saying about not eating your own pigs also recommends against

The correct answer is C. clan exogamy.

The Arapesh saying about not eating your own pigs implies a cultural practice of avoiding inbreeding within one’s own clan. This aligns with the principle of clan exogamy, where individuals are encouraged to marry outside their own clan to promote genetic diversity and strengthen social ties. By doing so, the Arapesh promote broader relationships and alliances beyond their immediate family or clan.