What transportation problem did Robert Fulton solve with his development of the steamboat?
A.) Without the steamboat, trade was conducted across roads that were overcrowded
B.) Before the steamboat, trade along the Mississippi could move only in one direction
C.) Until Fulton began using steam, only gas-powered boats could move along the Mississippi
D.) Prior to Fulton, boats were too small to carry large numbers of passangers
"B.) Before the steamboat, trade along the Mississippi could move only in one direction" would be the best option from the list, since the steamboat provided a way for boats to travel against the current.
