Which of the Following Is True with Regard to the Era

Which of the following is true with regard to the era of reforms in China?

A) In the agricultural sector, the government replaced a contracting system with mandatory grain purchases known as the danwei system.
B) Recognizing that China needed more exposure to Western products, ideas, and capital, Beijing lifted import restrictions in 1978 under its open-door policy.
C) Deng's economic reforms were headlined by the "Five Relationships."
D) In the cities, SOEs were given reduced discretion over their profits, and individual managers were made less accountable for their performance.