一道语法有些困惑，求助！

jessegxy

157. (33331-!-item-!-188;#058&006672)     [OG原题：OG10-246，OG11-136]

Joachim Raff and Giacomo Meyerbeer are examples of the kind of composer who receives popular
acclaim while living, often goes into decline after death, and never regains popularity again.

(A) often goes into decline after death, and never regains popularity again
(B) whose reputation declines after death and never regains its status again
(C) but whose reputation declines after death and never regains its former status
(D) who declines in reputation after death and who never regained popularity again
(E) then has declined in reputation after death and never regained popularity  

句子结构：Joachim Raff and Giacomo Meyerbeer are … who…, but whose reputation declines…
and never regains…  
这道题很容易选择。但就是曼哈顿上说定语从句一定要是相同先行词开头的才可平行，而这里是who和whose分别引导从句；白勇上好像有印象说相同功能的定语从句可以并列，这是C可以接受的原因嘛？相同功能大概是啥意思呢，是不是看先行词在从句中的作用。求NN帮助！谢谢