Final answer:
The statement is False. The opening of Fiddler on the Roof in 1964 did not mark the end of the golden age of "book" musicals. The book musical once again established a major presence in Broadway theaters.
Step-by-step explanation:
The statement is False. The opening of Fiddler on the Roof in 1964 did not mark the end of the golden age of "book" musicals. In fact, it was a significant contribution to the genre and is considered one of the greatest musicals of all time. While the commercialization of Broadway in the 1980s led to the rise of megamusicals, the book musical regained popularity in later years with shows like Hamilton, The Book of Mormon, and Dear Evan Hansen. So, the book musical once again established a major presence on Broadway.