Which option correctly describes the security enhancement added for OSPFv3?

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Which option correctly describes the security enhancement added for OSPFv3?

A. The AuType field in OSPFv3 now supports the more secure SHA-1 and SHA-2 algorithms in addition to MD5.
B. The AuType field is removed from the OSPFv3 header since simple password authentication is no longer an option.
C. The Authentication field in OSPFv3 is increased from 64 bits to 128 bits to accommodate more secure authentication algorithms.
D. Both the AuType and Authentication fields are removed from the OSPF header in OSPFv3, since now it relies on the IPv6 Authentication Header (AH) and IPv6 Encapsulating Security Payload (ESP) to provide integrity, authentication, and/or confidentiality.?
E. The Authentication field is removed from the OSPF header in OSPFv3, because OSPFv3 must only run inside of an authenticated IPSec tunnel.