<em>A. Reinstated the draft of soldiers.</em>
Explanation:
The Selective Training and Service Act was created in 1940 and made it so all young men between the ages of 21-45 were in the draft for the military and military training.
During this time, World War II was just starting and the United States needed to make sure they had soldiers, but especially soldiers who knew what they were doing.
Franklin D. Roosevelt, who was president, instituted the Selective Training and Service Act to prepare the United States for war. This was the first-ever peacetime draft, it trained men between the ages of 21-45 for military service while putting them in the draft.
