Which of the following is CORRECT about online testing at the moment？A．The third party pol

Which of the following is CORRECT about online testing at the moment？

A．The third party policy makes no sense to it.

B．Results of it are unbelievable.

C．Safe monitoring testing it is credible.

D．It is quite widely used in China.

请帮忙给出正确答案和分析，谢谢！