The Growth of the YMCA in Late-Nineteenth-Century American Cities Resulted

The growth of the YMCA in late-nineteenth-century American cities resulted from which of the following factors?

A) People newly arrived in cities needed an outlet for entertainment.
B) There was a greater need to train athletes for professional sports careers.
C) There was an epidemic of obesity across the United States in the nineteenth century.
D) The YMCA promoted "muscular Christianity" for white-collar workers.