求助sec11-20(白勇235页13题）答案牛牛们讨论各不相同？？

大全193 sec11-20

20.Byron possessed powers of observation that would have made him a great anthropologist and that makes his letters as a group the rival of the best novels of the time.
(A) makes his letters as a group the rival of
(B) makes his letters as a group one to rival
(C) makes his letters a group rivaling
(D) make his letters as a group the rival of
(E) make his letters a group which is the rival of

这个贴子里说大全答案是D，白勇书里答案是E，。

http://forum.chasedream.com/dispbbs.asp?boardid=23&replyid=1604457&id=16325&page=1&skin=0&Star=1

这个贴子里认为答案是E

http://forum.chasedream.com/dispbbs.asp?boardID=23&ID=27225

可是我觉得白勇的书里讲的也对啊，这题究竟D E相比哪个好呢，等解答。

D说使这些信成为一个组，那不就是书信集吗，书信集成为同时代的小说的竞争者，挺对的啊？

实在是搞不清楚是letters 还是group是竞争对手？？

谢谢楼上的，

不过还是不太明白，顶一下。