Which of the Following Differentiates Unilineal and Bilateral Descent Groups

Which of the following differentiates unilineal and bilateral descent groups?

A) Bilateral descent rules lead to more structured groupings than among unilineal descent groupings.
B) Lineages are only part of bilateral descent groups.
C) All cultures practicing unilineal descent rules exemplify all four types of unilineal descent groups.
D) Unilineal descent groupings are more structured than bilateral descent groupings.