Question

Which factor promoted the development of new forms of entertainment such as dance halls, carnival rides, and professional sports?
a. Busy city people no longer had time for older, more time-consuming forms of entertainment.
b. The new middle class had leisure time and extra money.
c. New technologies allowed people all over the world to view entertainment everywhere.
d. Unemployed urban workers needed ways to spend their time, so they would not turn to crime.

Answer 1

One factor that promoted the development of new forms of entertainment such as dance halls, carnival rides, and professional sports was that "b. The new middle class had leisure time and extra money," since the US economy was in a "boom" period. 

Answer 2

The correct answer is B. The new middle class had leisure  time and extra money.

Hope it helps and have a wonderful rest of your day!