Answer:
O He already knows that visitors to Narnia cannot use the same route twice.
Explanation:
C. S. Lewis's children's story <em>The Chronicles of Narnia: The Lion, the Witch, and the Wardrobe</em> revolves around the fantasy world of Narnia that the Pevensie siblings discovered in the closet/ wardrobe of the Professor they're staying with. The story delves into the theme of good and evil, and how the war between the two will always result in good triumphing over the bad.
Before the older Pevensie siblings had ever been to Narnia, the youngest Lucy tells them about it. Imploring to Edmund to back her up, Edmund instead lied and did not support her claim. But when the professor seems to imply that Lucy is indeed telling the truth, and that <em>"he believed the whole story"</em>. His advice to the children <em>"of course you’ll get back to Narnia again some day. Once a King in Narnia, always a King in Narnia. But don’t go trying to use the same route twice"</em> shows how he knew the truth about Narnia and tells them the truth about how to gain passageway to the kingdom. This shows that he has had a similar experience, and advised them about it before they make any mistakes.
Thus, the correct answer is the third option.
