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According to the Gravity Model, which two cities are most likely to have a high level of interaction?
Two moderate size cities, across the country, like Pensacola, Florida and Buffalo, New York.
Two cities like Tokyo and Los Angeles separated by the Pacific Ocean.
Two cities, on the Pacific coast, one with a large population, like San Francisco, California and a medium size city like Portland, Oregon.
Two small cities close to each other, like Fort Walton Beach, Florida and Gulf Breeze, Florida in the panhandle of Florida.
Two large urban centers that speak the same language, one foreign, like New York City and London, England.