Read and choose the best answer to complete the dialogue.Mary: What is the most interesting job in your mind? Joe: The most interesting job? It’s hard to say which one is the most interesting. If I have to name one, it is a film director.Mary: A film director! Joe: Yes. I think a film director can put his dream into the film. He can also give his film different styles if he wants.Mary: En, it’s a very special job. What’s more, a film director can earn a lot of money. Joe: But a great film director never ______________________. They work for their dreams.
选项：

A:works for the country;
B:works for the people;
C:works for money;
D:works for the film