Answer:
Option C.
Explanation:
The blockade of West Berlin was counteract by the establishment of a massive airlift with supplies from the United States, France and the United Kingdom in 1948 and 1949. The right answer is C.
Answer:The precursors to World War I led to an increase in immigration from some regions of Europe.
Explanation:
The railroad boosted the economic status of the USA the transportation of raw materials and manufactured good to and from industries became faster and easier after the completion of the railroad
Raised morale among colonists
The progressives tried to help children by limitng maximum hours of labor and in establishing a minimum age for children to be allowed to work.
There were also mandatory laws in different states for children to attend school.
The Progressives believe that government should take an active participation to solve the problems in a society like poverty, education, woman and children rights, job opportunities and best conditions for living.