Which advance in medical technology has affected the standards of living of the greatest number of people in developed and developing nations?
the advances in cancer treatment
the use of lasers for surgery
the development of vaccines
the ability to transplant organs

"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.