Which of the following had the strongest effect on helping Western European nations rebuild their economies after being devastated by World War II?

Responses

the aid supplied by the Marshall Plan
the aid supplied by the Marshall Plan

the policy of containment adopted by the United States
the policy of containment adopted by the United States

the increase in trade with Eastern European countries
the increase in trade with Eastern European countries

the Soviet blockade of Berlin
the Soviet blockade of Berlin

the aid supplied by the Marshall Plan