hard20 pts · first answer countsupgradeabilityopenzeppelin

Namespaced storage layout

OpenZeppelin Contracts v5 upgradeable modules store their state in structs at slots defined by ERC-7201. What problem does this solve?

A.Adding variables to a parent contract no longer shifts the storage slots of child contracts, so upgrades are less likely to corrupt storageB.It removes the need for proxiesC.It makes storage reads cheaper than memory readsD.It encrypts upgradeable storage

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Namespaced storage layout

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