单选题 The findings of the two studies contradict each other, though both groups of scientists have used the same method.

【正确答案】 D

【答案解析】被替代词contradict each other的含义是“互相顶牛”。与选项D．disagree with为同义词。正确答案为D。辨义：A．agree with与……一致；B．confirm证实；C．complement补充。