What is meant by the statement America may well become a minority majority nation?

What is meant by the statement America may well become a minority
  majority nation?
 
  A. Minor political parties, like the Tea Party, will soon become the
  political party of choice for most Americans.
  B. Congress will have more women and persons of color elected to
  office than men and whites in the near future.
  C. The US population will be comprised of more nonwhites than
  whites due to foreign-born immigration.
  D. Because of recent immigration policies, the US will be divided
  into minority and majority population states.