问题如下图：
选项：能否解释一下选项B是什么意思？
A. 
B. 
C. 
解释：
NO.PZ2019103001000080 Comment 2 Benchmark corporate bonissues normally have wir sprea tholr bon of the same issuer. 一）這句話怎麼翻譯 有點看不懂 二）這個知識點我在講義相對應的頁數第349頁 沒有看到 這是什麼概念？
NO.PZ2019103001000080 新发债券供给提升，价格下降，那么新发债券价格的下降会导致Cret sprea大，olr的boncret sprea会变大，水涨船高，那么怎么确定哪个sprea升的更多呢？
NO.PZ2019103001000080 Comment 2 Comment 3 C is correct. When issuer announces a new corporate bonissue, the issuer’s existing bon often cline in value antheir sprea win. This namic is often explainemarket participants effeof increasesupply. A relatereason is thbecause manis not perfectly elastinew issues are often given a priconcession to entiborrowers to buy the new bon. This priconcession mresult in all of issuer’s existing bon repricing baseon the new issue’s relatively wir sprea A thirreason is thmore issuanmsignincrease in issuer’s cret risk. 新发行债券不应该是增加了其他债券的流动性风险么，报价会更难报
Comment 2 Comment 3 C is correct. When issuer announces a new corporate bonissue, the issuer’s existing bon often cline in value antheir sprea win. This namic is often explainemarket participants effeof increasesupply. A relatereason is thbecause manis not perfectly elastinew issues are often given a priconcession to entiborrowers to buy the new bon. This priconcession mresult in all of issuer’s existing bon repricing baseon the new issue’s relatively wir sprea A thirreason is thmore issuanmsignincrease in issuer’s cret risk. Callable oas不是 就是应该比noncallablebon小么
Comment 2 是什么意思呢？
