What is the central 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.
Learning ballet takes time and effort.
B.
Each type of ballet requires different skills.
C.
Ballet requires dancers to memorize their moves.
D.
Choreographers design a ballet performance.