The correct answer is C. Under the Northwest Ordinance of 1787, which created the Northwest Territory, General St. Clair was appointed governor. When the territory was divided in 1800, he briefly served as governor of the Northwest Territory remnant that included Ohio, the eastern half of Michigan, and a sliver of southeastern Indiana called "The Gore."
St. Clair formally established the government on July 15, 1788, at Marietta. In 1789, he renamed the settlement of Losantiville Cincinnati, after the Society of the Cincinnati, and moved the administrative and military center to Fort Washington.