From a design perspective which two of the following OSPF statements are most relevant? (Choose two)
A. OSPF stub areas can be thought of as a simple form of summarization
B. OSPF cannot filter intra-area routes
C. An ABR can only exist in two areas – the backbone and one adjacent area
D. Performance issues in the Backbone area can be offset by allowing some traffic to transit a nonbackbone area
E. The size of an area (the LSDB) will be constrained by the size of the IP MTU
