What does the writer say about space solar power?

Câu hỏi: What does the writer say about space solar power?

A. It's much easier to build a solar power station in space than on Earth.

B. It's a science fiction idea, and nobody really thinks it will work.

C. People tried it in 1941, but they didn't succeed.

D. It's an old idea, but people are only starting to develop it now.