During prohibition days, what was the significance of the 3-mile limit? a. there was an island there that served as a meeting spot for smugglers b. it was an ocean boundary where federal agents had no power to make arrests c. it was the furthest that law enforcement could travel in a day to search for bootleggers d. it was the amount of alcohol that moonshine could contain to be considered legal

The correct answer is:  

B. It was an ocean boundary where federal agents had no power to make arrests  

William S. McCoy is credited with the idea of bringing large boats just to the edge of the three-mile limit of U.S. jurisdiction, and there selling rum to contact boats, local seamen, small boats, floatplanes, and flying boats. Soon the three-mile limit became known as "Rum Line" and the ships waiting were called "Rum Row".