What is a reason for an EIGRP router to send an SIA reply to a peer?

A.
to respond to an SIA query with the alternative path requested
B.
to respond to a query reporting that the prefix has gone stuck-in-active
C.
to respond to an SIA query that the router is still waiting on replies from its peers
D.
to respond to a reply reporting that the prefix has gone stuck-in-active
Answer is C.
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why not A?
Both are correct. A reply would have either an unreachable or a new route.
http://www.cisco.com/c/en/us/support/docs/ip/enhanced-interior-gateway-routing-protocol-eigrp/16406-eigrp-toc.html#queryrange
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don’t think sia-replies inform the router of a useable route. it just tells the sia-querier “im still here and still calculating”
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