Select the correct answer. What is the main idea of this passage? Ballet is a demanding art form that requires time and dedication to perfect. Ballet dancers must have great flexibility and body strength. In addition, a dancer must memorize every movement of the performance. A choreographer creates the ballet steps and helps the dancers learn them. It may take years for a dancer to refine his or her movements. A. There are many types of ballet. B. Choreographers design a ballet performance. C. Learning ballet takes time and effort. D. Ballet requires dancers to memorize their moves. E. Each type of ballet requires different skills.