The answer to that would be C The authority belonged to the colonist
Walking. Prehistoric humans came over on a land bridge between Russia and Alaska and worked their way down into south America.
He NAACP opposed racist views that terrorized and segregated people of color. They were an intellectual group that help to bring about fairer education (Brown vs. Board of Education, 1957) kinder housing and anti-lynching, They felt all humans should be treated with justice, kindness and equality and lobbied to foster positive change in America. (Thank goodness they brought awareness to so much cruelty and injustice. It still makes me cringe to think the U.S. was and still is so uninformed about human issues.)<span>
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First, they made settlement of the West possible after the Civil War by connecting farmers (and miners, ranchers, loggers, and others) to markets.
Second, railroads helped to integrate different regions of the country economically.