Answer:
D
Explanation:
It's just d I don't have anything else to say
This information was taken from the article <em>"Three Forks Area", </em>published by the Oklahoma Historical Society. The complete paragraph goes as follows:
One of the earliest people to set up trade in the Three Forks area was Jean Pierre Chouteau. He and his brother had been running a successful trading post for years in their St. Louis Headquarters .The trading post at Three Forks was set up on the Neosho River in 1796.
Jean's half-brother's name was August Chouteau.
The County unit system. See the link below that will take you to that.