Why Did Countries Support China's Ascension into the WTO,despite Its

Why did countries support China's ascension into the WTO,despite its centrally planned economy?

A) They believed China would change the rules of the WTO to be more in favor of developing countries.
B) They believed China would be more likely to care about trade disputes than it had previously.
C) They believed China would be less willing to challenge the existing economic system if and when it became powerful.
D) China has promised to limit its abuse of human rights if it could join.