Choose 1 option.

According to the AgentForce Testing and Validation Guidelines, all automated or large-scale test runs in Testing Center should be executed in a sandbox environment to prevent any unintended modifications to live CRM data.

Running tests in production can trigger record updates, create cases, or call actions that alter live data, violating best practice standards for safe validation. Testing in a sandbox ensures the environment mirrors production logic while maintaining data isolation.

Option A contradicts this best practice, as production testing risks data integrity. Option B does not prevent data changes — limiting test volume does not safeguard against unintended record modifications.

Therefore, the correct approach is Option C – Use the Testing Center only in the sandbox environment to maintain data safety and compliance.