It was significant because it ended slavery in the United States after the Civil War; was passed by Abraham Lincoln.
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.
Answer:
Edison is regarded as one of the greatest inventors in history. He founded one of the world's first modern research laboratory. And in his lifetime, he patented more than 1,000 inventions.
