Which in-flight conditions are required by a supplemental air carrier to conduct a day, over-the-top flight below the specified IFR minimum en route altitude?
A.The flight must remain clear of clouds by at least 1,000 feet vertically and 1,000 feet horizontally and have at least 3 miles flight visibility.
B.The flight must be conducted at least 1,000 feet above an overcast or broken cloud layer, any higher broken|overcast cloud cover is a minimum of 1,000 feet above the IFR MEA, and have at least 5 miles flight visibility.
C.The height of any higher overcast or broken layer must be at least 500 feet above the IFR MEA.
正确答案是B