For your us history class you are assigned to give a speech about how the us economy has significantly changed in the past 200 years

What else is needed in this? Is there anything specific?

b. great plains

hope this

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.