What was the boundary set by the missouri compromise of 1820?

Henry Clay then skillfully led the forces of compromise, engineering separate votes on the controversial measures. On March 3, 1820, the decisive votes in the House admitted Maine as a free state, Missouri as a slave state, and made free soil all western territories north of Missouri's southern border.

The correct answer for the question is option  > > > d< < <   worked together to keep control of the us in the hands of the wealthy.i hope this answer you guy