Question: What is the purpose behind the Three Phase Commit? It improves upon the two phased commit by requiring that locks be acquired at the start

What is the purpose behind the Three Phase Commit?
It improves upon the two phased commit by requiring that locks be acquired at the start of a transaction.
It allows for coordination even in the event of unreliable network connections.
It ensures that no shared locks are help by other connections in the event of a write operation.
None of the above.

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