Answer:
Economic: shortage of domestic goods
Political: letter bombs sent to government officials
Social: race riots in northern cities
Step-by-step explanation:
Political: letter bombs sent to government officials. After World War 1, there was a series of a letter bomb sent to journalists, officials and the representative in the United States by those protesting against capitalism.
Economic: shortage of domestic goods. After World War 1, there was a shortage of domestic goods in the United States because all the resources that were supposed to be used the production of goods were all used during the war to produce weapons.
Social: race riots in northern cities. The race riots occurred between the Americans and other races. As a result of the war that occurred in the south, the African Americans and other races migrated to the north (the great migration). After the war in the south, the northerners see them as a competition which led to the rift in the northern cities.