The correct option is Document.

Document stores hold semi structured records as JSON or similar formats and they contain named fields and nested objects and arrays. A document database organizes data into collections of such documents so you can query by field names and store complex object graphs inside each record.

Time series is not correct because time series stores are optimized for sequences of timestamped measurements and not for arbitrary JSON documents with named string fields.

Graph is not correct because graph databases represent data as nodes and edges for relationship queries rather than as collections of JSON documents.

Key-Value is not correct because key value stores map a key to an opaque value or blob and they do not expose structured named fields within the stored value in the same way a document store does.

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