Answer:
D. a message about the topic of the text.
Salamanders can regrow entire limbs and regenerate parts of major organs, an ability that relies on their immune systems, research now shows. ... They then wiped out some or all of the macrophage cells to determine whether these cells were essential for regrowing the limbs.
When quote marks are used internet search engine searches for exact phrase. It does not separate words. If there were not used quote marks it would show all pages containing words American and folklore.
Key word AND means that internet search engine will show only pages that contain what is before and after that word.
The given search gives results that include entire phrase "American Folklore" and that have word "ghosts inside the page.
Correct answer is: Hits with the entire phrase American Folklore about ghosts.
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