What is the role of the states in a
federal system?

Answer :state Government: Role. Under the new design, the role of the state government is to promote the state economy and to take operational control over most government programs for individuals, such as social programs and risk management

Explanation:

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.