23.steven was playing trumpet loudly the whole night. but i wasn't bothered by his loudness so much as by his lack of _____

a.temper b.appearance c.talent d.character.为什么选C，怎么翻译句子，别的答案也解释下。not so much as , 是不是翻译与其。。不如。。。

1.not so much...as
【问】："“That trumpet player was certainly loud.
I wasn't bothered by his loudness______by his lack of talent.”
A.so much as B.rather than C.as D.than (TOEFL,全国四级，99.6-69）这位小号手的却吹得很响。响亮的比他缺乏才能更使我烦躁。（《TOEFL全真考题语法题型分析》，华南理工大学出版社，p446）
上面的译文我认为不符合愿意。但又不知道如何译才好。请指教。
【答】：上面的译文似应译为;
使我烦恼的与其说是他吹的太响，不如说是他缺乏演奏才能。或：他缺乏演奏才能比他吹得太响更让我烦恼。

not so much ...as还是译为“与其说……不如说……。昨天给你的回答弄错了，切忌不要把not ao much...as与另一结构not so...as混为一谈了。
以上解释摘自《英语常见问题解答大辞典（增订版）》 作者：赵振才 第959页。
里面的959——961详细列举了有关not so much...as的各种用法，想进一步透彻理解的话，你看看这本书。是在是太长了，我没法都给你一一打出来了。要是还不明白再问我吧。