Answer :
Answer:
The answer is D. it allowed the federal government to expand the military through the draft
Explanation:
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Selective Service Act contributed to the war effort because its allows the federal government to expand the military through the draft.
The Selective Service Act was signed into law by Former President Wilson and provides that all men which are between the age of 21 - 30 to register for military service.
This provision allows the military numbers to increase and build confidence to go to war.
Therefore, the Option D is correct because the provision expanded the military.
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