A major factor contributing to Japan’s economic growth since the 1950’s had been ??? Please help

The correct answer is A) Government support for Japan's large corporations.

Explanation:

Japanese large corporations like Mitsubishi or Toyota have received support from the government since the early 1950s. This support comes in the form of funding, tariffs, intellectual property protection, associated research, and education of workforce. Without government protection, these companies would probably be much weaker.

They have responded well because they have helped the Japanese economy grow ever since, albeit at a much slower pace since the economic crash of 1989.

what the first or next guys says

your answer would be a) no nation can be economically self-sufficient.

stay in school!