How should component units be displayed in government-wide financial statements?

How should component units be displayed in government-wide financial statements?
      a.   Component units should not be reported in government-wide financial statements
      b.   All component units should be included either in the column for governmental activities or in the column for business-type activities
      c.   Component units should be blended where appropriate; discretely presented component units should be reported in a separate column   
      d.   All component units should be included with other business-type activities