题目内容：
What can be inferred from the passage?
A．Levitt’s houses have led to the great shift in population after the Second World War. B．William Levitt had tapped the postwar desire of young Americans to raise their children outside the central city.
C．Levittown has become the world’s most perfectly planned community.
D．The population of the United States increased sharply after the Second World War.
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