Question: What is a blockchain? a . A blockchain is a digital database consisting of records called class. b . More than one of the above

What is a blockchain?
a. A blockchain is a digital database consisting of records called class.
b. More than one of the above
c. A blockchain is a centralized digital ledger consisting of records called blocks.
d. A blockchain is a decentralized, distributed, digital ledger consisting of records called blocks.

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