There are a second set of landing gear indicator lights on the aft overhead panel. These lights:
A.A.Illuminate red when the related landing gear is not down and locked and the gear handle is down.
B.B.Illuminate red when the related landing gear is not down and either thrust lever is retarded to idle at a radio altitude of 800 feet or less.
C.C.Illuminate green when the landing gear is in agreement with the landing gear lever.
D.D.Are a redundant but separate set of landing gear indicator circuits and green lights.
正确答案是D