How has tribal government generally changed over the past few decades?
a) it has become independent of the federal government.
b) it has become part of the state government
c) it has begun to exist for the first time
d) it has been allowed more power to self-govern

b) it has become part of the state government

Explanation:

Tribalism is a social organization, historically, the first source of identity and certainty from individual to group, for the human being. It encompasses in a word the different manifestations: beliefs, traditions, language, art, culture, religions or pseudo-religions that come from the small communities denominated tribes. Reaffirms the sense of belonging and allows individual self-realization; in other words, it gives meaning to the world from a perspective of immediate scope. At present it is said to the union or grouping of people with customs, traditions, ethnic origin or common interests. Since these organizations are thousands and all these characteristics are often diverse and exclusive of a single tribe, they are all referred to by the same denomination.

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i do knot know this