Which of the following reasons is the best possible explanation for the changes in europe's population since 1750?
an increase in scientific and medical discoveries improved life expectancies.
political revolutions caused a shift from absolute to constitutional monarchies.
the enlightenment encouraged european peasants to increase their family sizes.
the scientific revolution led to a sharp increase in immigration

"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.