1. What is the main idea of the text? OA. Living in space is a smart and inexpensive option for people looking for a new home. B. There are many ways to save the planet and the best way is to have people move to space. OC. It may someday be possible to live in space, but there are a lot of things we would need to learn first. OD. It would be too difficult for people to live on Mars, but they could live on the International Space Station.
