Refer to the exhibit.  What is the result of setting GLBP weighting at 105 with lower threshold 90  and upper threshold 100？ （）

A.Only if both tracked objects are up will this router will be available as an AVF for group 1.

B.Only if the state of both tracked objects goes down will this router release its status as an AVF  for group 1.

C.If both tracked objects go down and then one comes up， but the other remains down， this router  will be available as an AVF for group 1.

D.This configuration is incorrect and will not have any effect on GLBP operation.

E.If the state of one tracked object goes down then this router will release its status as an AVF for  group 1.