Convince people to conserve resources, the US government attempt to do during World War I. Thus, option (d) is correct.
What is World War I?
The Great War, generally known as World War I, started in 1914. A world war is one in which all the major nations of the globe actively participate, or come close to doing so.
Encourage people to purchase bonds, food administration, and War Industries Board in order to conserve resources during World War I.
Therefore, option (d) is correct.
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