What is the 'Nakamoto Coefficient' in the context of blockchain decentralization?
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A
The minimum number of entities that would need to collude to compromise a blockchain's consensus mechanism
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B
The ratio of mining reward to transaction fees in Bitcoin's block subsidy
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C
A measure of how often Satoshi Nakamoto's original wallets are referenced in new transactions
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D
The percentage of nodes needed to achieve a network supermajority