The kansas-nebraska act
a. established farming communities.
b. joined kansas and nebraska into one territory.
c. caused bloodshed as abolitionists and slave owners fought.
d. solved many local economic problems.

lewis and clark (i think)

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.