This passage is mainly about      .(  )

• A、the difference between national income and GNP
• B、the difference between national income and personal income
• C、the concept of income
• D、the difference between disposable income and nondisposable income

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 In the text,a Sunday feature is a kind of newspaper advertisements in which young people look for husbands and wives.(  )

• A、Right

• B、Wrong
  

• C、Not mentioned