Refer to the exhibit.
Which option is the function of designing a hub and spoke confederation?
A.
allows transit backbone area 66000 to be a blackhole for non-transit ASs
B.
reduces the iBGP mesh, iBGP mesh will be in sub non-transit ASs
C.
increases eBGP sessions between the confederation sub ASs
D.
allows transit backbone area and non-transit ASs to run the same IGP