Leading up to the civil war, which of the following events occurred first?
a.
abraham lincoln was elected president.
b.
john brown and his followers raided the federal armory at harper’s ferry.
c.
the dred scott decision nullified the missouri compromise.
d.
the compromise of 1850 was passed.

Leading up to the Civil War, the event that occurred first was D. the passage of the Compromise of 1850.

It is called the Compromise of 1850 to the passage of five bills by the United State Congress in 1850. Moreover, these laws, which dealt with the issue of slavery, were proposed by Henry Clay of Kentucky, who sought to end the conflict between the North and the South. After the bills were passed, the slave trade in Washington was abolished. The passage of the Compromise of 1850 occurred before the presidential election of Abraham Lincoln in 1860, John Brown's raid on Harpers Ferry in 1859 and the Dred Scott decision in 1857.

is there multiple