Why was homer plessy arrested?

he said his rights had been violated.
he was clearly of mixed heritage.
he refused to give his seat to a white person.
he sat down in a train’s whites-only car.

"the plan of removing the aboriginal people who yet remain within the settled portions of the united states . . approaches its consummation. . an extensive region . . has been assigned for their permanent residence. it has been divided into districts and allotted among them. many have already removed and others are preparing to go. . " removal of southern indians to indian territory, 1835 this passage is most closely related to a) imperialism. b) the civil war. c) westward expansion. d) the french indian war.