What is the name of the Stephen Schwartz musical that serves as a prequel to a famous film about Dorothy, telling the story of the witches of Oz?

• A The Wiz
• B Wicked ✓
• C Oz the Great and Powerful
• D The Wizard of Oz

Wicked, based on Gregory Maguire's novel, opened on Broadway in 2003 and follows Elphaba and Glinda before Dorothy's arrival in Oz.