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Resposta D
D. Cloud Datastore/Firestore For user-specific state information that varies significantly and requires a schema that can evolve over time, a NoSQL database like Cloud Datastore or Firestore is typically more appropriate. These databases provide a flexible schema, which allows you to easily make changes as the application evolves and user requirements become more complex.
The last sentence subtly implies a schema-enforced database is not the right solution for this use case.