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Sagot :
A transaction is stored in the case when a network confirms that a transaction has not occurred yet on the blockchain. Hence, option C 'a transaction is stored' is the correct answer.
Blockchain is a system of recording information in such a way that makes it difficult or impossible to hack or change the system. A blockchain is generally a digital ledger of transactions that is replicated and distributed across the whole network of computer systems on the blockchain. In other words, blockchain is a distributed public digital ledger that is used to record transaction-related information across many computers so that the transactional records cannot be altered retroactively without the modification of all subsequent blocks and the consensus of the network.
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Complete question is:
which of the four criteria is occurring when a network confirms that a transaction has not yet occurred on the blockchain?
A. a hash is added to the block
B. a transaction occurs
C. a transaction is stored
D. a transaction is verified
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You can learn more about Blockchain at
https://brainly.com/question/25700270
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