Proof of Stake based blockchain systems use what design to permit valid write transactions?

Proof of Stake based blockchain systems use what design to permit valid write transactions?
A . A genesis “Stake” node approves or disapproves transactions announced from other nodes
B . Validator nodes each give or pay a stake in order to write transactions, and if malicious, will lose their stake
C . Stakeholders or early product investors host nodes that approve or disapprove transactions from other nodes
D . Every node on the network holds an equal stake, and if malicious, gets flagged for removal

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Answer: B