The persistence and perseverance of american homesteaders in the late 1800s led to an expansion of the frontier. delayed railroad construction for decades. brought about the closing of the frontier. was fruitless in the face of so many difficulties.

the correct answer would be C. it brought about the closing of the frontier

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the answer to the question is C

lincoln won 212 electoral votes to mcclellan's 21 votes, and lincoln beat mcclellan. is the main reason lincoln won in 1864.

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