What must be true for Envoy to release a flight under IFR requirements?

For Envoy to release a flight under IFR (Instrument Flight Rules) requirements, it is essential that multiple factors align to ensure compliance with safety and operational standards. The correct choice reflects that all listed conditions must be met.

Firstly, sufficient fuel is a critical requirement. The aircraft must carry enough fuel to reach its destination, including any alternate airports and reserves for contingencies. This ensures that there is enough fuel to manage unexpected delays or diversions.

Secondly, optimized weather conditions are vital. IFR flights need to contend with weather that meets minimum criteria to allow safe operation. This involves evaluation of the weather conditions at the departure and destination locations, as well as any alternate airports, to ensure that visibility and cloud cover are within acceptable limits for IFR operations.

Lastly, a thorough inspection of the aircraft is necessary prior to any flight. This inspection ensures that all systems are functioning correctly, which is crucial for the safety and operational readiness of the aircraft under IFR conditions.

Since all these components—sufficient fuel, optimized weather, and a proper inspection of the aircraft—are integral to ensuring a safe flight operation under IFR requirements, it is clear why the answer reflects that all must be true for a flight release.