Answer:
C - the goernment feared that certain groups might work to sabotage and not help the U.S. efforts in the war
Explanation:
This fear the government had regarding minorities, allowed them to not use the manpower to the fullest potential, leading to 'inactive manpower'
Overall the cause of the World War was the assassination of Archduke Franz Ferdinand because Nationalism was a great cause for World War one because of countries being greedy and not negotiating.
