请教雅思剑桥6 test4第三篇阅读33题为啥不选B,原文对应后面一句也有说almost certainly untru

看33题,以“”内的句子为定位词回原文找,直接定位到C段,然后前后句扫读信息（一般是前后12句含有信息,由于这段是非规则段落,直接从头开始读）,很幸运在第一句中我们就可以看到Until recently,not much was known about the topic,and little help was available to teachers to deal with bullying.其中not much was known替换答案的a lack of knowledge并且ittle help was available to.替换答案中的resources,因此答案直接确定D.
B选项may not in fact made by many schools和原文中的‘There is no bullying at this school' has been a common refrain,almost certainly untrue.相矛盾.原文中指的是“在学校没有bullying这种行为”这已经成了学校们普遍说的一种陈述了,即便这大部分不是真实的.和may not made by many schools矛盾了.