In instrument practice, which statement about IFR flight plan filing is accurate?

In instrument practice, which statement about IFR flight plan filing is accurate?

• A. You may file using a flight bag app or call Flight Service.
• B. IFR filing must be done exclusively via telephone with Flight Service.
• C. IFR filing is required for all IFR flights and nothing else.
• D. IFR filing is optional in all cases if you have VFR conditions.

Answer: (D)