Which of the following sentences is INCORRECT？A．The rest of the bicycles are on sale today

Which of the following sentences is INCORRECT？

A．The rest of the bicycles are on sale today.

B．A substantial portion of the reports are missing.

C．What kinds of cherry tree flourish best in this region？

D．This is one of the most interesting questions that have been asked.

请帮忙给出正确答案和分析，谢谢！