单项选择题

Though Disney World is in America, it is also the famous entertainment center in the world. When people talk about Walt Disney, they always think of Snow White, Mickey Mouse, Donald Duck and so on. When Walt Disney was drawing one night, he suddenly heard a strange sound. The sound came from the waste-basket (废纸篓). Walt looked at it and saw a family of mice eating pieces of bread in it. For many nights, they played there. Arid Walt began to like them.
Walt liked one little mouse than any of the others. This little animal gave him some new ideas for his drawing. He began to draw it. But in the picture, it didn’t look like a mouse, but more like a funny man.
Walt named it "Mickey Mouse". He wanted to make it talk. He put his fingers on his nose and made a strange sound. Then he recorded (录音) the sound this way. Later he sold his sound pictures to a cinema. Mickey Mouse in the film sang and danced and did all kinds of funny things. People couldn’t help laughing when they saw it. It was a great success. Ever since then, Walt’s Mickey Mouse has been one of the most famous films in the world.
The writer mainly talks about ______.