Which three statements are correct about the differences in IS-IS and OSPF? (Choose three.)

A.
IS-IS LSP contains TLV fields and OSPF LSU contains the LSAs.

B.
New additions to the protocol are easily implemented in OSPF but not with IS-IS.

C.
For greater fine tuning there are more IS-IS timers.

D.
OSPF has more area types than does IS-IS.

E.
IS-IS is more CPU-intensive than is OSPF.