【正确答案】 A

【答案解析】[解析] 语义衔接题。结合文章and in doing this you should make clear that the audience is aware of the speaker's...in his field. Some individuals are so well-known in their fields及常识可知，向大众演讲的人至少是具备演讲资格的，故听众要了解的应是演讲者在其领域中的资格。