Read the following passage and circle the letter A, B, C or D to indicate the correct answer to each of the question
Most of the people who like films are only interested in the leading actor or actress when they enjoy a film. It seems to them that only the actors or actresses have made the film successful. They always pay attention to their appearance, performance, and fashion. There are many film viewers who have no awareness of other people's work to make a film. A finished film is actually, the result of the collaboration of many people, and the most important among them are the scriptwriter, the cinematographer, the film editor, the actor, and the director. Especially, in some thrilling scenes, the roles of stuntmen are very important. They are always in danger when they are acting, some of them are even badly hurt or dead. But what a pity, many film viewers rarely appreciate their work.
Question: The work of stuntmen is ...........