What is the primary purpose of a 'safing' sequence within an Emergency Shutdown Procedure?

1. To back up all critical test data to a secure server before power is cut.
2. To transition the test article and related systems from a hazardous condition to a stable, non-hazardous state.
3. To notify senior management that an emergency event is in progress.
4. To perform a diagnostic sweep of all sensors to determine the cause of the emergency.