答案及解析：[单选题]“Respected Chairperson, friends, first of all let me express my sincere gratitude to the Association - 语言文学类题库- 答案窝(daanwo.com)-大学生作业答案及考资分享平台

问题：

[单选题]“Respected Chairperson, friends, first of all let me express my sincere gratitude to the Association of Commonwealth Universities for inviting me to this conference.” is an example of ___________.
Aintroducing yourself
Bstating your topic
Csummarizing the main points
Dshowing gratitude to the audience