选A
原句意思为：当然,那位唢呐手吹得够响亮的．但使我感到不安的,与其说是他的音量太高,倒不如说他缺乏天分．
so much as用在否定句中,在该句型中,一般肯定有者,而否定后者．将这个句子的顺序制调整一下为正常顺序,那答案就显而易见了．i wasn't so much bothered by his loudness as by his lack of talent.
rather than一般用在肯定句中,肯定前者,而否定后者．