Merchant captains would use which method to get products around the u. s. waterways?
large cargo ships
steam boats
river barges
ships with large masts

Merchant captains would use steam boats method to get products around the United States waterways.

Explanation:

The steam boats are those ships or boats whose primary source of power is steam. In these types of boats or ships coal is majorly used as fuel to generate steam and move the propeller shaft of the ship to make it move in water in desirable direction. These ships were majorly used to carry goods across the water ways. Sometimes they were also used as transportation to carry passengers through the water but majorly they were used for transportation of goods and were very famous and useful as merchant ships in old times especially in United States because it was a large hub in terms of marketing and water ways were cheapest and most suitable for delivering goods and importing goods from other countries in low transportation cost.

i really do want to but i just don't know it i'm so sorry : (