What happens when an A/P firewall cluster synchronizes IPsec tunnel security associations (SAs)?

What happens when an A/P firewall cluster synchronizes IPsec tunnel security associations (SAs)?
A . Phase 1 and Phase 2 SAs are synchronized over HA3 links.
B. Phase 1 SAs are synchronized over HA1 links.
C. Phase 2 SAs are synchronized over HA2 links.
D. Phase 1 and Phase 2 SAs are synchronized over HA2 links.

Answer: D