Why did the provinces of British North America desire to unite into a dominion under the British government?

also called Constitution Act, 1867, the act of Parliament of the United Kingdom by which in 1867 three British colonies in North America—Nova Scotia, New Brunswick, and Canada—were united as “one Dominion under the name of Canada” and by which provision was made that the other colonies and territories of British North America might be admitted. It also divided the province of Canada into the provinces of Quebec and Ontario and provided them with constitutions. The act served as Canada’s “constitution” until 1982, when it was renamed the Constitution Act, 1867, and became the basis of Canada’s Constitution Act of 1982, by which the British Parliament’s authority was transferred to the independent Canadian Parliament.

Explanation:

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.  

the answer is definitley b!