What does the passage mainly talk about？A．NASA is cooperating with private companies.B．The

What does the passage mainly talk about？

A．NASA is cooperating with private companies.

B．The international space station is getting a new inflatable module.

C．NASA is launching a private space station.

D．Bigelow is investing on inflatable space habitats.

请帮忙给出正确答案和分析，谢谢！