Question

what rule did the missouri compromise establish in the creation of new states?
○ future states to the north of a set point would be free.
○ states could decide if they would be free states or slave states.
○ all states would be free.

Explanation:

The Missouri Compromise established that future states north of the 36°30′ parallel (except Missouri) would be free states, and Missouri was admitted as a slave state. So the rule was about future states north of a set point being free.

Answer:

A. Future states to the north of a set point would be free.