Music is believed to have a comforting effect.

　　题干大意：人们认为音乐可以产生安慰的效果。题目的关键词是"comforting"，对应原文第一段第一句：Everyone knows that listening to music when feeling bad can provide a relief.原文是说人人都知道当心情不好的时候听音乐可以给你安慰，题目与原文的意思一致，故选A。