Which of the following tag questions is INCORRECT？A．Let"s go and listen to the music, shal

Which of the following tag questions is INCORRECT？

A．Let"s go and listen to the music, shall we？

B．It"s impossible, isn"t it？

C．Everything is ready, isn"t it？

D．He didn"t say he wanted to visit Japan, didn"t he？

请帮忙给出正确答案和分析，谢谢！