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 area.
B . It allows ASBRs to inject external routing information into the area.
C . An ASBR advertises Type 7 LSAs into the area.
D . An ABR advertises Type 7 LSAs into the area.
E . It uses opaque LSAs.
Answer: BC