Question

the main purpose of the selective service act of 1917 was to
increase the size of the armed forces by using the draft.
restrict membership in the armed forces to those with prior combat experience.
allow all branches of the armed forces to be sent to europe.
equip the armed forces with the necessary weaponry for battle.

Explanation:

The Selective Service Act of 1917 established a conscription system (draft) in the U.S. during World War I to rapidly expand the armed forces, as voluntary enlistment was insufficient. Other options are incorrect: it did not restrict membership to combat-experienced individuals, dictate deployment to Europe, or handle weapons supply.

Answer:

A. increase the size of the armed forces by using the draft.