The south threatened to from the union if their political interests were not met. western territories had not yet joined the union.

The south threatened to succeed from the union.

Secede.

The south threatened to leave the union as they did not want to be apart of a nation, or secede.

This was due to the fact that the South was pro-slavery while the North was anti-slavery and they also didn't want Abraham Lincoln to be elected president.

Hope this helps!

although world war i began in 1914, the united states did not join the war until 1917. the additional firepower, resources, and soldiers of the u.s. to tip the balance of the war in favor of the allies. remaining neutral. when war broke out in 1914, the united states had a policy of neutrality.

d) iowa i believe is the answer