Answer:
I think Letter C, I think because of the 19th century, modernization, and transformation to the modern world ignored the lower classes and that makes the empire to be abolished.
Hello There! ^_^
Your question: The Thirteenth, Fourteenth, and Fifteenth Amendments reflected the growing 19th century American trend of.?
Your answer: The Thirteenth, Fourteenth, and Fifteenth Amendments reflected the growing 19th century American trend of increasing the basic civil liberties of all races.
Hope this helps! :D
It gave them all the right to be equal as one.