The correct answer is B) the Organic Act.
The act that set the formula for Oklahoma statehood was the Organic Act.
To establish formal boundaries that make a state in the United States, you need the proper legislation to be passed in Congress to make it official. That is what the Organic Act of 1890 did with the Oklahoman territory, It defined the boundaries of the state. So under this legislation, the Indian territory unified and formed what we know today as Oklahoma. This united tribes such as the Osage Nation, Cherokee Nation, the Cimarron territory and the Choctaw and Seminole Nation.
