During the first part of the 19th century, it was mainly "<span>C. the railroad and the telegraph" that</span> revolutionized transportation and communication, since these greatly increased efficiency and speed.
The Mason-Dixon line was created to form a <span>resolution of a border dispute involving Pennsylvania,Delaware in Colonial America and Maryland.</span>
Answer:
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Explanation:
One of the main reasons why the federal government was unable to maintain order in the new nation was because "<span>D The government was unable to regulate trade," since this meant that states could choose what products and services they wanted to allow in their borders. </span>