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

D.The flow of oil from the region´s oil fields.

The countries in the middle east are the main producers of oil and exporters to the US, when the conflict in the middle east took place these countries weren´t able to keep the flow of oil as it was before.