Which of these means of transportation would have been used by the most people in the united states in the late 1800s

They used horses, ships, and trains but I'm not sure which one they used the MOST which is what your question is asking. Although I wouldn't go with train because many people didn't believe that trains would work back in the day, and on top of that, the first rail road was invented in 1869. So if I were to guess which one was the most popular i would go with horses. :)

The correct answer would be Trolleys

Hope this helps ^-^

honestly i really it keep confusion down on some sides

a.) a poor farmer, due to the fact that they would want to be freed from british rule.