What was the process illustrated in the diagram designed to do? a. ensure that state governments submit to federal authority under the constitution b. give state legislatures more influence over decisions to change the constitution c. ensure that the constitution could only be changed with overwhelming support d. prevent certain parts of the constitution from ever being changed

The correct answer is C.

The process contained in the diagram ensures that both the elected representatives that constitute the federal powers, together with those that work at the state level have to mostly agree with the proposed amendment to allow its sucess. It makes it possible to amend the Consitution, as long as the necessary support is gathered both at the federal and state level. Therefore, amendments are not federal pieces of law that are imposed on the states, because these also participate in their enactments.

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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.