Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions. The main idea of the passage is .

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Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

The main idea of the passage is .

the problemwith Gliese581g

thecreationofanalternativeSun

thedevelopmentofspace exploration

thesearch foranewplanettoliveon

Giải thích

D. the search for a new planet to live on