The trailing edge flaps are at 15 units. The correct indication on the aft overhead panel for the leading edge devices is:
A.A.All amber TRANSIT lights illuminated
B.B.All LE devices FULL EXT lights illuminated
C.C.All LE devices EXT lights illuminated
D.D.LE slats EXT lights and LE flaps FULL EXT lights illuminated
正确答案是B