In plessy v. ferguson the supreme court held that

a. separate facilities for african americans did not violate the fourteenth or fifteenth amendments

b. the state needed probable cause to seize another person’s property

c. the federal government had authority over interstate commerce

d..slaves could not be recognized as citizens

its main object was the establishment of "settlement houses" in poor urban areas, in which volunteer middle-class "settlement workers" would live, hoping to share knowledge and culture with, and alleviate the poverty of, their low-income neighbors.

the graph shows the spread of railways in the 1800s.

based on the graph, the conclusion that can be drawn about germany is answer d)   by 1880, germany had more rail lines than great britain and russia.