The passage is mainly to ______. A: reveal that everything in Potter was imagined by Rowling B: tell the truth about Flamel behind the tales in potter C: point out the inability of alchemists to defend themselves D: address that alchemy had an impact on modern science

According to the passage, that Flamel gained eternal life with the aid of his powerful pebble ______. A: came fromJ.K. Rowing's imagination B: was legendary long before Rowling wrote the book C: turned out to be a magic in Potter D: was believed by many alchemists