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阅读理解：
A new study has found no evidence that sunscreen,commonly used to reduce the risk of skin cancer,actually increase the risk.
Researchers from the University of Iowa based their findings on a review of 18 earlier studies that looked at the association between sunscreen use and melanoma（黑素瘤)They said that they found flaws in studies that had reported associations between sunscreen use and higher risk of melanoma.
The word"flaws"in the 2nd paragraph most probably means _______.
A.evidence
B.facts
C.faults
D.failures
正确答案：C
答案解析：本题选C，本段表明：到目前为止还没证据能证明sunscreen会增加skin cancer的几率，接下来的段落也解释了使用sunscreen跟skin cancer没有必然的联系，故排除A.B.D选项。
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