15. How did the potlatch help the societies of the Northwest?
A.) By attending potlatch, members of neighboring tribes were guaranteed safety from invaders.
B.) During the potlatch ceremony, goods were brought to one ruler, who unified the tribes.
C.) The potlatch ceremony was created as a way to welcome new tribes into the existing nation.
D.) In the potlatch ceremony, wealth was redistributed, creating balance within the tribes.