Question: Barge transportation statistics. Visit the Web site of the American Waterways Operators (https://www.americanwaterways.com/). Click on "Facts About the Industry" and answer the following questions:
a. How many barges are in operation in the U.S.?
b. What commodities are typically shipped by barge in the U.S.?
c. Compared to railroads and trucks, why are barges a more economical way to ship certain types of commodities?'