What ceiling and visibility minimums prevent flying VFR in controlled airspace except for special VFR?

The correct answer establishes specific minimums that are essential for flying under Visual Flight Rules (VFR) in controlled airspace.

In controlled airspace, to legally operate VFR, pilots must adhere to defined visibility and ceiling criteria. If the weather conditions do not meet these minimums, the only option available is to request Special VFR clearance, which allows aircraft to operate under VFR in controlled airspace despite not meeting standard visibility and ceiling requirements.

For most classes of controlled airspace, the minimum requirements are a ceiling of 1,000 feet above ground level and visibility of 3 statute miles. This standard ensures that pilots have sufficient visual reference to maintain safe separation from both terrain and other air traffic while operating in controlled environments.

The other options present lower visibility and ceiling requirements, which do not align with the established regulations regarding VFR operations in controlled airspace. Therefore, they would not correctly represent the minimums preventing VFR flights without Special VFR clearance. Having a clear understanding of these criteria is crucial for flight safety and compliance with regulations.