Answer:
The correct answer is A) The rapid influx of immigrants made it difficult for local governments to provide basic services.
Step-by-step explanation:
As the United States grew after the Civil War there was a need for immigrants to work on the plantations, in the cities and build the country through it's gilded age.
This meant a wave of immigrants coming in from Western and Eastern Europe as well from Asian countries like China.
Urban areas were being squeezed as the infrastructure had already been tested to its limits due to movement of rural folks to the cities.
As local government found it difficult to provide the very basic services, there was a movement towards political machines. These 'machines' were able to support people and provide them basic necessities while holding considerable local political power.