What company did muckraker ida tarbell write about?

She wrote about the Standard Oil Company.

Explanation:

She was an American journalist who pioneered in investigative journalism. She wrote a book called "The History of Standard Oil Company". Her work helped to dissolute the monopoly which the company possesses and influenced in the Anti-trust act enacted by the U.S. government in 1914.

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it would be that mali has the worst literacy rate than the others

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.