Why Are Clans Usually Represented by Symbols Such as Totem

Why are clans usually represented by symbols such as totem poles?​

A) ​Because they use the same surnames, they use symbols as a way of marking territory in common.
B) ​Because they lack residential unity, they use symbols for common identification.
C) ​Because they are often groups that speak different languages and have different customs, this is their point of common identity.
D) ​They use symbols as a way of creating cultural status that has symmetry with natural class divisions.