During the 1970s, what was threatened by the conflict in the middle east?
the spread of communism
trade between israel and the united states
trade between egypt and nicaragua
the flow of oil from the region’s oil fields

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.