13．D 推理判断题。根据二段however, the new rules came too late to protect the people who died or who became seriously ill.可推断政府过去并未引进相关的安全措施，故选D。
14．C 细节理解题。根据第二段New safety rules were often introduced as a result of these inquiries可判断选C。
15．C 细节理解题。分析最后一段可知，C项内容不符合文意，故选C。
