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From 1980 to 1989, the population between the age of 25 and 44 increased by 28.1% in America because_____.

  • A.those who were born during the period of large inflow of immigrants reached this age bracket
  • B.those who were born after the World War Ⅱ reached this age bracket
  • C.those who were born during the World WarⅠreached this age bracket
  • D.those who were born before the World War Ⅱ reached this age bracket
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