How did changes in the late 1800 affect the lives of children?

C. Many were attending new and improved elementary schools.\

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Explanation:

the answer is a. the declaration of independence.

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.