Prior to the reform and opening-up, China's traditional economic system had many shortcomings, such as ____________ .

A、the law of value and market mechanism were neglected;

B、the state had too much control over the enterprises;

C、there were no incentives to bring into full play the initiative, wisdom and power of both the enterprises and the masses ;

D、the enterprises just kept the foreign exchange and did not turn it over to the state