Why did the kingdom of aksum decline?
(a) muslim invaders gained control of the port city adulis, cutting them off from trade.

(b) a leader named mutota gained control in the 1400s and conquered the kingdom.

(c) gold mines flourished to the south, creating competition, and resulted in their decline.

(d) a leader named mutota gained control in the 1400s and conquered the kingdom

The right answer is:

(A) Muslim invaders gained control of the port city Adulis, cutting them off from trade.

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it was certainly a debatable decision, mainly because it was based primarily on political - and not on legal or social - views. since the congress at that time was led by members of the republican party, and the territory that the tribes wanted to turn into an exclusively indian state was predominantly democratic, the proposal (as expressed in the constitution) did not succeed, but the constitution itself proved to be of crucial importance in the creation of the state of oklahoma, and, most importantly, it guaranteed the involvement of representatives of the indian tribes in the government of the future joint state.  

as a member of congress, i would have voted to ratify the constitution, or at least to have it tabled. ignoring it was an interested and partial decision.  

d) post-world war i