Which factor promoted the development of new forms of entertainment such as dance halls, carnival rides, and professional sports
? a. The new middle class had leisure time and extra money.
b. Unemployed urban workers needed ways to spend their time, so they would not turn to crime.
c. Busy city people no longer had time for older, more time-consuming forms of entertainment.
d. New technologies allowed people all over the world to view entertainment everywhere.
The factors which promoted the development of new forms of entertainment were (A). The new middle class had leisure time and extra money.
With more leisure time and money to spend, middle class people turned to alternate and upcoming forms of entertainment such as dance halls, carnival rides and professional sports.
What you need here is something that can be in plural, so any uncountable nouns, such as traffic and information (options a and c respectively) are not possible. this leaves us with option b) as the correct option!
