A、She specialized in short films. B、She featured famous actors. C、She told a long story. D、She used special effects. A对话中提到女士说决定

M: It seems that almost every city now has its own film festival. This is a good thing. But how can you make your festival different to all the others? One of the answers, it seems, is to specialize.
W: There are hundreds of film festivals all over the world now. In Italy there are at least 20. (19) We decided to make ours different — shorter!
M: This is Valentina Ricciardi. She is the curator of a festival of short films in Italy. Valentina, why short films?
W: Well, there are lots of reasons. Firstly, I think that short films are a very undervalued form So many big films now have so many special effects and famous actors, that they often don’t have a story! We’re not interested in special effects or leading "A-list" actors. None of that matters in a short film. (20) A short film is a real test of being able to tell a good story in a few images.
M: It goes back to what film is really about.
W: Exactly! Added to that, it’s so expensive to make a film now. First time directors can’t hope to make a full-length feature film. (21) Short films are great places for new directors to practice their skills. You don’t need a huge budget to make a short film—just a huge imagination!
M: So money is also a factor?
W: Of course. The big film festivals in Cannes and Venice cost a fortune to put on. Many short films are now made using high quality digital video. This means they can be stored on DVD, so we don’t have to transport large, heavy reels of film.
M: Ok, thank you.
19．How did the woman make her film festival different?
20.What is a film really about according to the woman?
21.What do short films mean to new directors?