What do the kuba ngady amawaash masks represent?

a. the kuba ngady amawaash masks represent the nyim's wife and, more generally, womanhood.
b. the kuba ngady amawaash masks represent the kuba leaders strength and more generally, manhood.
c. the kuba ngady amawaash masks represent youth, strength, and authority.
d. the kuba ngady amawaash masks represent the strength of all the people in the tribe.