What are two functions of an NSSA in an OSPF network design ?(Choose two)
A. It overcomes issues with suboptimal routing when there are multiple exit points from the areas
B. It uses opaque LSAs
C. It allows ASBRs to inject extemal routing information into the area
D. An ASBR advertises type 7 LSAs into the area
E. An ABR advertises type 7 LSAs into the area
