Question

1. The flight of the middle class to the suburbs hurt cities because the middle class (1 point)

Answer 1

It's a well-known fact that people of the middle class paid a large share of the taxes. (usually, people with high income hide it from the govenment, so the taxes are focused on the middle-class)
So, the first one is A.
During the postwar Latinos almost have no power (in many instances) for many years, so the only suitable option is A. had little political power.
And the last one is C. A government practice of moving Native Americans from the reservations to the cities.