题目内容

某珠宝商店失窃,甲、乙、丙、丁四人涉嫌被拘审。四人的口供如下:甲:案犯是丙。乙:丁是罪犯。丙:如果我作案那么丁是主犯。丁:作案的不是我。四个口供中只有一个是假的。如果以上断定为真,则以下()项是真的。

A. 说假话的是丙,作案的是丙
B. 说假话的是甲,作案的是甲
C. 说假话的是乙,作案的是丙
D. 说假话的是丁,作案的是丙和丁
E. 说假话的是甲,作案的是乙

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