Question

what was one effect of the expansion of the federal government during world war i?
many social service agencies came to the aid of the poor and elderly.
the efficiency of the federal government increased significantly as more agencies were established.
the military gained both domestic and international power.
the federal budget went from less than $800 million in 1916 to $18 billion by 1919

Explanation:

During World War I, the federal government's role expanded. Social service agencies aiding the poor and elderly became more prominent as the government took on more responsibilities.

Answer:

Many social service agencies came to the aid of the poor and elderly.