Which of the following statements about the tentative addresses generated during IPv6 address allocation are correct?

Which of the following statements about the tentative addresses generated during IPv6 address allocation are correct? (multiple answer)

A. A tentative address is used for duplicate address detection (DAD).

B. If a device receives a response NA message sent by another site during DAD for a tentative address, the device cannot use the tentative address.

C. If two devices are assigned the same IP address (a tentative address during DAD), the device that receives an NS message during DAD cannot use the address.

D. If two devices are assigned the same IP address (a tentative address during DAD), the device that sends an NS message during DAD cannot use the address.