What can we learn from the passage? ( )

参考解析：

选项A：沉重的学生贷款债务迫使许多工人推迟买房，原文并没有提及买房的内容，所以A项不当选；选项B：公司的贷款偿还计划没有税收优惠，无中生有，不当选；选项C：贷款偿还规则可能适得其反，根据原文第四段......and then they're working there simply because they don't want to have to repay, which is counterproductive," she says......可以看出C项是符合原文的，当选；选项D：学生贷款债务稳步下降，根据原文第二段Student loan debt has not only become more common, but the size of the average loan has nearly doubled over the past decade.可知学生贷款债务不仅变得越来越普遍，而且平均贷款规模在过去十年中几乎翻了一番。D项说的与原文恰好相反。故本题正确答案选C。