The reforms of China's Deng Xiaoping that were introduced in 1976 have ___.

A. set up the first special economic zones near Beijing and Taiwan

B. decreased light industry production

C. increased the power of the central government

D. quadrupled the size of China's economy

I believe the answer is: quadrupled the size of China's economy

Prior to the reform, China adopted full communistic principle which make the government owns all the resources in the country.

The economic reform introduced by Deng Xiaoping allow adopted capitalistic principle by allowing private sector to took control of the resources, which make a lot of people become motivated to generate wealth.