The correct answer is C) poor whites in Northern cities felt a sense of unity with Southern blacks who moved into their neighborhoods.
The statement about American cities during the1960s that is not true is "poor whites in Northern cities felt a sense of unity with Southern blacks who moved into their neighborhoods."
Many American cities in the North of the United States maintained a kind of segregation to black people that moved up North from the Southern states. In that decade, society was shaped by what you bought and have, fomenting consumerism and enlarging the breach of whites and blacks, people with money and poor people. The Suburbs of the large cities increased the economic difference between rich and poor people.