After world war 1 immigration was based on

a quota system.

Explanation:

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china is shifting toward specialization in industry and services and away from agriculture.

explanation:

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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.