Please help I'm stuck
What did the Missouri Compromise of 1820 accomplish?
A. It allowed Missouri to enter the union as a free state.
B. It allowed Maine to enter the union as a slave state.
C. It created a dividing line between free and slave states.
D. It created the Fugitive Slave Law.

Ahistorian has discovered a letter written by an early roman emperor. she translates the letter and discovers that it contains orders to a general before a battle. she works to determine when the letter was written to figure out which battle the letter references.the historian in the passage is most clearly demonstrating which historical thinking skill? a. identifying causes and historical contextb. thinking chronologicallyc. making and evaluating arguments and interpretationsd. analyzing historical sources