(Topic 1) How are LSPs acknowledged on IS-IS broadcast links?

(Topic 1) How are LSPs acknowledged on IS-IS broadcast links?
A . The LSP is acknowledged by sending a PSNP PD
C . The LSP is acknowledged by sending an LSP PD
E . The LSP is acknowledged by sending a Hello PD
G . LSP are not acknowledged on broadcast links. The DIS sends periodic CSNPs to maintain database synchronization

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Answer: D