Which two improvements do SIA-Query and SIA-Reply messages add to EIGRP? (Choose two)

Which two improvements do SIA-Query and SIA-Reply messages add to EIGRP? (Choose two)
A . Stuck-in-active conditions are solved faster.
B . They prevent a route from going into the stuck-in-active state.
C . They help in the localization of the real failure in the network.
D . The EIGRP adjacency between two neighbors never goes down.

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Answer: A, C