Hurry plz brainliest to correct answer Explain how competition is affected in these four types of market structures: pure competition, monopolies, oligopolies, and monopolistic competition. In addition, include examples of each type of market structure.

Which answer best describes the u.s. national road? it ran from atlanta to baltimore and followed the railroad. it ran from new york to chicago and was made from wooden planks. it ran from massachusetts to ohio and ran parallel to the canal system. it ran from maryland to illinois and was made using macadam construction.