The Missouri Compromise included all of the following EXCEPT A) it ad

The Missouri Compromise included all of the following EXCEPT

A) it admitted Missouri to the Union as a slave state and Maine as a free state to preserve the free state-slave state balance in the U.S. Senate.
B) it mandated that all states after Missouri which were located north of the 36 ° 33 ° north parallel, the southern border of Missouri, would be admitted as free states.
C) it created opposition from most northerners in the House and the Senate and support from almost all U.S. Senators and U.S. Representatives from the South.
D) it represented a political failure of Henry Clay of Kentucky who had attempted to persuade his Senate colleagues to reject the political compromise over slavery.

ANSWER
Answer: D