SAT:The information age has ushered children into a global s

SAT:The information age has ushered children into a global society,this situation causing
The information age has ushered children into a global society,（this situation causing educators to lament） a lack of texts that explain the diversity of cultures.
这里的 this situation 要换成 a situation,但是a situation 可以指代前面一整个句子吗?
如果把this situation causing educators to lament 换成 which is the cause of educators lamenting 有the cause of sb.doing（算是动名词） 的用法吗 这里的which 指代global society不可以吗?