What best demonstrates that the U.S. government grew during World War 1?

The U.S. government expanded significantly during World War I through the creation of new agencies and the implementation of wartime measures. Notably, the War Industries Board was established to coordinate production and allocate resources, while the Food Administration promoted food conservation and increased agricultural output. Additionally, the government enacted the Selective Service Act, which instituted a draft to bolster military enlistment. These actions reflect a substantial increase in government involvement in both the economy and daily life to support the war effort.