Which three characteristics apply to IS-IS but not to OSPF? (Choose three.)

A.
runs PRC (Partial Route Calculations) to calculate IPreachability information

B.
uses stubby areas to improve network scalability

C.
uses a DIS and a backup DIS to present thepsuedo-node on the LAN

D.
uses a default IOS metric of 10 on each interface

E.
encapsulates PDUs directly into a data-link frame

F.
uses an on-demand circuit to reduce the hello and LSA flooding across switched WAN links,
such as ISDN