What did the zagwe dynasty and kongo have in common? they both warred with the portuguese. they both were situated along the nile river. they both adopted islam. they both adopted christianity.

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.