What event (s) caused Japan to quickly grow a highly productive manufacturing economy?

a. bombing of Nagasaki and Hiroshima

b. oil discoveries on the mainland of Japan

c. Marshall Plan to rebuild Europe and Japan after World War II

d. advances in technology and a highly educated/skilled labor force

The event that caused Japan to quickly grow a highly productive manufacturing economy was the fact that they were supported by the Marshall Plan which was intended on rebuilding Europe and Japan after World War II - C. Through the plan, they were able to educate their workforce in a relatively short amount of time become a very important global power.