What was a sign that a dinasty had lost the mandate of heaven a. invasion by nomadic warriors. b.election of a new dynasty. c.an increase in the imperor's political authority .d. the start of a new religious movement

How long ago was the fall of rome (in years)

Which best describes the impact of the crusades on european exploration?

Which options most accurately assess the impact of transportation improvements (e.g., railroads, canals, steamboats, transcontinental railroad) on the settlement of the west? ***(select all that apply.)*** a. they led to an increase in population density. b. they made it easier to travel long distances. c. they in establishing towns. d. they led to the development of the fur trade. e. they allowed for international travel.