Which of the  following statements about the improvement of  ADSL2  relative to  ADSL  is correct: ( Choose one or more )

Which of the  following statements about the improvement of  ADSL2  relative to  ADSL  is correct: ( Choose one or more )
A . The  frequency band of  ADSL2  is twice that of  ADSL
B . At the same transmission rate,  ADSL2  can transmit longer distances than  ADSL
C . Compared with  ADSL, ADSL2  adds a new operating mode
D . ADSL  can support flexible bandwidth binding function, such as  IMA  (  Inverse Multiplexing forATM  ,  ATM  inverse multiplexing )

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Answer:   BCD