China was the last significant economy to attempt to utilize self-sufficient development.
Step-by-step explanation:
During the 1970s, China adopted a policy of self-sufficient development, known as the "Four Modernizations". The policy was focused on increasing agricultural and industrial production, modernizing technology and improving the standard of living in the country. The Four Modernizations were in the areas of agriculture, industry, science, and defense. This policy was implemented under the leadership of Mao Zedong and Deng Xiaoping, and it played a significant role in the country's economic development and modernization.
It's important to note that India also attempted to utilize self-sufficient development during the same period, but China was the last significant economy to attempt this development model.