A、Because it looks more attractive at night than in the daytime. B、Because all the buildings there have lights on all night. C、B

W: Hi, Sam! Haven’t seen you for ages. Where have you been these days?
M: Hi, Linda. I went to Paris on business and then I did some sightseeing there.
W: So you were in Paris. Tell me about it, will you?
M: Well, there’s so much to say about it. I don’ t know where to begin.
W: Tell me about the Eiffel Tower first.
M: Oh, it’s great. It’s the symbol of the city, you know. Hard to imagine how it was built over a hundred years ago.
W: Did you go to the top of the tower?
M: Sure. I dined at a restaurant on the top platform and enjoyed the splendid view of Paris at night. The footlights on the magnificent buildings and palaces are so beautiful that the city has got a nickname of a City of Light.
W: What about the Louvre Palace? Did you go there?
M: How could I miss it! I spent a whole day inside and still couldn’t finish seeing all its collections of world-famous treasures.
W: What treasures?
M: You must have heard about Mona Lisa, haven’ t you?
W: Yes, of course. Did you see the original painting?
M: Yes. And I saw the Greek statue of Venus de Milo, too.
W: The Greek goddess of love? Oh, You’re so lucky, Sam. I really wish I could have a chance to visit Paris.
M: You will, I’m sure. And there is the Arch of Triumph.
W: Is that the one that was built in Napoleon’s time?
M: Well, it was Napoleon who started building it but the Arch was not completed until fifteen years after his death.
W: Where else did you visit in Paris?
M: I walked along the Seine River and enjoyed the views on both banks.
W: Did you take any pictures?
M: Yea. I took a great many. I’ll show them to you and tell you more about the city.
W: That’s great.