*CHOOSING BRAINLIEST, 15 POINTS*
The excerpt best serves as evidence for which of the following developments in the late 1800s?
A) The impact of the construction of transcontinental railroads on United States commerce
B) The growing support for labor unions among the owners of corporations
C) The emergence of arguments that wealthy people had a moral obligation to help society
D) The decline of urban centers as immigrant populations moved westward
