Question
O With more than 700 steamboats shipping goods along U.S. rivers, there was not enough room for additional water traffic.
© Steamboat service was very expensive, so small farmers and factories needed alternate means of water transport.
O Steamboats could travel only along large rivers, and no such rivers linked the castern states with western lands.
Answer
There was limited space for additional water transport due to the high number of steamboats, and steamboats could only travel on large rivers, limiting access to western lands.