What was the main response of the middle class to the challenges of city living?

Responses:

a) escape to the suburbs

b) move to high-rise apartments

c) rent out tenement buildings

d) attend vaudeville shows

a) escape to the suburbs

The main response of the middle class to the challenges of city living was a) escape to the suburbs. This was a trend that gained popularity in the late 19th and early 20th centuries as urban areas became more crowded, polluted, and filled with social problems. Many middle-class families sought a better quality of life by moving to the outskirts of the city, where they could enjoy more space, cleaner air, and access to natural surroundings.