What best characterizes slavery in the north during the revolutionary era?

The slavery in the North never reached the same number and intensity of the slavery in the South. The controls and tactics of the slaves were less severe than that of the South, though there were slaves who played key roles in the eve of the revolution at different parts of America. Though in the North, the slave population decreased faster than that of the South.  

the right answer is the third one: turnpikes went short distances to connect markets. turnpikes, also known as toll roads, were very important for trade and transportation (of people, goods and products) in the 19th century, coinciding with the expansion towards the west. they contributed significantly to the economic development of the united states.