The sharing and division of power between the state and federal courts is called the principle of

there are no mutiple choices here

answer; people where able to travel across the u.s.a faster than any other mode of transportation,travel time was about a week,from coast to coast

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john maynard keynes developed new economic theories in response to the : b) great depression of the 1930s. his theories are so important that they are known as "keynesianism". in his works he supports the idea of a government with deeper involvement and intervention to end the great depression.