题目内容

对那些很少刷牙的人来说，罹忠口腔癌的危险性更高。为了能在早期发现这些人的口腔癌，某市卫生部门向该市居民散发了小册子，上面描述了如何进行每周口腔的自我检查以发现口腔内的肿瘤。下面哪个选项如果正确，最能质疑上述做法的效果______

A. 口腔癌在成年人中比在儿童中更为普遍
B. 这份小册子被散发到该市的所有居民
C. 很少刷牙的人不大可能每周对他们的口腔进行检查
D. 许多牙病症状是不能在每周自我检查中被发现的

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