In 1915, Germany tested the United States’ neutral stance to World War I when it refused to do business with American companies.
attacked the mainland of the United States.
sank the passenger ship Lusitania.
asked Mexico to attack the United States.

"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.