A developer uses Copilot to generate fixtures for an integration test. The production customer export contains personal data. Which approach best supports useful and safe testing?

1. Generate synthetic records that satisfy the schema and include representative edge cases.
2. Use empty objects for every record so no private fields appear.
3. Copy real records into the repository and rely on its private visibility.
4. Paste the complete export into chat and ask Copilot to change only customer names.