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I don’t understand This question

The Marshall Plan required a reduction of interstate barriers, a dropping of many regulations, and encouraged an increase in productivity, as well as the adoption of modern business procedures. The Marshall Plan aid was divided among the participant states roughly on a per capita basis.

aa

explanation:

literally the answer is aa. not kidding. aa is a group.

i believe

clean air is essential for health and survival

clean air provides nitrogen gas for plant respiration

clean air supplies oxygen that enables living organisms to breathe

hope this

i am brianly

sorry if this doesn't