Prior to the twenty-first century, what events influenced offshore oil exploration in the united states the most?

Oil spills, is the right answer.

Explanation:

The discharge of a liquid petroleum hydrocarbon into the atmosphere, particularly the aquatic ecosystem, due to personal enterprise, and is a kind of pollution, is known as an oil spill. The term is basically used in the context to marine oil spills, where oil is discharged into the sea or coastal lagoons, but spills may likewise occur on the ground. Prior to the 20th century, the oil spill impacted marine oil exploration in the U.S.

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in the 1800s, locomotives powered by steam made transportation faster and cheaper. the resulting rapid growth of railroads led to the connection of the atlantic and pacific railroad in oklahoma city in 1897.

in the last years of the century, the improvement of steam-based engines the expansion and growth of railroads. this growth increased when the companies started to build and expand, such as the atlantic and pacific railroad, which connected new mexico with california, and missouri with oklahoma. many of these new networks were built in oklahoma, and these changes transportation henceforward.