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What distinguishes column family databases from traditional relational databases? a . They support SQL for queries. b . They utilise row - centric storage for

What distinguishes column family databases from traditional relational databases?
a.
They support SQL for queries.
b.
They utilise row-centric storage for data organisation.
c.
They require data to conform to predefined structures.
d.
They use key-value pairs for organising data.

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