The right answer is "(4) increase government control of the economy".
Here is a quick explanation of how this happened:
During the war, Wilson focused on diplomacy and financial considerations, leaving military matters to his generals, especially John J. Pershing. Lending billions of dollars to the United Kingdom, France, and other allies, the Americans financed much of the Entente war effort. A temporary compulsory military service was instituted in the country, carrying 10 000 trained conscripts to France in the summer of 1918. At home he raised taxes, borrowed billions and encouraged people to help in the effort. With the help of the unions, it increased the economic potential of the United States and invested heavily in the industry, increasing government regulation, especially in agriculture, also giving Treasury Secretary William McAdoo direct control over the American rail system.