Marginal status of the first reserve field means that the combination of the first reserve field weather live report and forecast indicates that when the aircraft is expected to arrive at the destination airport, the weather conditions are above the minimum weather selection criteria for the reserve field as specified in the corresponding article of this manual, but below the corresponding term (MDH or DH/ RVR or visibility) plus "( )" meters
A.60/500 B.60/400 C.30/400 D.30/200正确答案C
