How was the wave of u. s. immigration in the late 1800s different from the previous wave of immigration in the mid-1800s

What was the importance of the open door policy?

Which of the following statements describes the effect of increased internet usage on reporting

Which of these is not a criticism of the concentric zone model? it does not accurately describe cities after the rise of suburban development. it only applies to cities that grew after the development of the automobile. it assumes that inner-city areas will always be repurposed instead of abandoned. it places too much importance on the traditional central business district.