The correct answer is : China had been closed to most foreigners.
Deng opened China to foreign investment, the global market and limited private competition. He is credited with the development of China in one of the fastest growing economies in the world for more than 30 years and the rising standard of living of hundreds of millions of Chinese.
Well obviously it would be a and c since b is did vantage
Neither slavery nor involuntary servitude, except as a punishment for crime whereof the party shall have been duly convicted, shall exist within the United States, or any place subject to their jurisdiction.
it bans slavery