黄皮书GAME Page 120 答案有误?...!

pcpcpcpcpc

Planes1,2,3,and 4--and no others--are available to fly in an air show.
    Pilots Anna, Bob, and Cindy are all aboard planes that are flying in the show and they are the only qualified pilots in the show.
    Copilots Dave, Ed, and Fran are all aboard planes that are flying in the show and they are the only qualified copilots in the show.
    No plane flies in the show without a qualified pilot aboard.
    No one but qualified pilots and qualified copilots flies in the show.
    Anna will only fly in either plane 1 or plane 4.
    Dave will only fly in either plane 2 or plane 3.

22. If Cindy and Fran are the only person in one of the planes, which one of the following must be true?

a)Bob flies with Anna

b)Dave flies with ED

c)Dave and Ed fly with Bob

d)Dave flies with Bob

e)Ed flies with Anna

书上答案是C,我是D

lawyer_1

The answer in my book is D. D is the correct answer

pcpcpcpcpc

crap, seems I got the wrong book. Thanks.