The author mentions outer space because______.  

Câu hỏi: The author mentions outer space because______.  

A rock formations in outer space are similar to those found on the ocean floor

B  the Earth's climate millions of years ago was similar to conditions in outer space. 

C  it is similar to the ocean floor in being alien to the human environment   

D techniques used by scientists to explore outer space were similar to those used in ocean exploration