Read the following selection from the article. Interstellar explorers really need a surefire way to identify living "things." That poor chap in the first paragraph might still be alive if only he'd had a dependable "Life Checklist." How does this selection communicate the author's purpose? A It heightens the reader's interest in reading stories about space exploration. B It explains that there is a specific definition applied to all living things in space. C It introduces the need for and importance of a checklist for defining life. D It offers evidence to suggest that the chances of finding life on another planet are high.​