【正确答案】 A

【答案解析】[解析] 细节题。本题问的是：求职者主要抱怨的是什么?根据文章第1段前两句“Young people often wonder at the large number of employers who do not respond to their applications for jobs．They say that despite enclosing return envelopes they hear nothing at all...”可知，年轻的求职者们不明白为什么招聘方不回复他们的求职信，甚至在他们附上了回邮信封之后也没有收到回信，这是他们最为不满的地方。故选A)。