单选题 The ______ to the advertisement she placed in the newspapers was very good; over a hundred letters of application were received.
【正确答案】 A
【答案解析】[解析] 各选项的意思是:response答复,反应,响应;answer回答,回音,答案;correspondence函件,通信联系,一致;echo回声,共鸣。根据句意可知,答案是A。