Final answer:
True. Over 3,000 miles of canals and 30,000 miles of railroad track were built in the United States before the Civil War.
Step-by-step explanation:
True. By 1840, more than three thousand miles of canals were dug in the United States. These canals played a vital role in connecting different regions and promoting trade and transportation. Additionally, thirty thousand miles of railroad track were laid by the beginning of the Civil War, further revolutionizing the transportation system.
Learn more about Canals and Railroad construction in the United States