问题如下图：
选项：
A. 
B. 
C. 
解释：
NO.PZ2017121002000001 题目问的是按照issuer的分类，可是结构化债券不属于按照issuer的分类（应该只有超国家、国家、公司那几个）吧？感觉结构化债券按照信用分级来分感觉更靠谱
可以翻译一下这道题吗？理解不了英文表达，所以不知道问的啥？
structurefinansector. government angovernment-relatesector. B is correct. Asset-backesecurities (ABS) are securitizeinstruments createsecuritization, a process thinvolves transferring ownership of assets from the originowners to a specilegentity. The specilegentity then issues securities backethe transferreassets. The assets’ cash flows are useto pinterest anrepthe principoweto the holrs of the securities. Assets thare typically useto create securitizeinstruments inclu loans (sumortgage loans) anreceivables (sucret carreceivables). The structurefinansector inclus susecuritizeinstruments (also calleasset-backesecurities).B为什么是按照issuer分类的一种？这个是在哪里提到的呢
请问老师，ABS为何会属于结构化产品呢？这段英文答案里也没有清楚
