According to the passage, all the following statements are TRUE EXCEPT that______.
A.a competition process will be held to select the four astronauts
B.the cost of Mars One could go as much as $ 6 billion
C.if it goes as planned, we could expect to watch Mars One on TV
D.the four astronauts could return to Earth after a few years" stay on Mars
请帮忙给出正确答案和分析,谢谢!