What does the author point out by writing that a picture ignited a great deal of interest in Mars in line 18?

42/117

Schools focused on educating students on Mars

More pictures of Mars became available

People wanted more satellites to be sent to Mars

Many people began to think about Mars

Giải thích

5. Dẫnchứng “Years later, in the 1960s and 1970s, the United States … there was - or had been - intelligent life on Mars.” Chọn B