Which of the following statements is INCORRECT according to the news item？A．Curiosity will

Which of the following statements is INCORRECT according to the news item？

A．Curiosity will be the seventh NASA spacecraft to land on the Mars if successful.

B．Curiosity will trave at about 20,000 kilometers per hour when it hits the Martian surface.

C．Curiosity is the size of a small car and has 17 cameras.

D．Curiosity will be lowered to the Martian surface on cables and cut loose before the rocket pack blasts off.

请帮忙给出正确答案和分析，谢谢！