Which of the following descriptions about the difference between SPFv2 and SPFv3 are correct?

Which of the following descriptions about the difference between SPFv2 and SPFv3 are correct?
A . Both SPFv2 and SPFv3 support interface authentication, and OSPFv3 authentication is still implemented based on the fields in the SPF packet header
B . SPFv3 is similar to SPFv2 and uses the multicast address as the destination address of SPF packets
C . SPEv2 and OSPFv3 have the same type of packets: Hello, ODD, LSR, LSU, LSAack, and their packet formats are the same
D . The protocol number of SPFv2 in the IPv4 header is 89, and the next header number of OSPFv3 in the IPv6 header is 89

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Answer: B