Which type of historical text typically focuses on a particular topic, integrating primary and secondary source documents to advance an argument?

Ahistorian who compares the expansion of political systems to the expansion of economic systems is organizing history by

What deadly disease cost many workers their lives before dr. william gorgas found a treatment?

"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.