At a Veteran's Day celebration, Ed has been asked to speak to a local citizens group

about American involvement in World War II. He begins his presentation like this:

From the time I was very young, I wanted to learn to fly.
My family was very poor and so flying lessons were out of the question.
But, when America became involved in the War, I immediately enlisted in
the Air Force. There I learned to fly and during the course of the war I
flew 56 bombing missions. I was honored to receive the Distinguished
Flying Cross, and it was an even greater privilege to have played a small
role in freeing those who had suffered at the hands of the Nazis.
Which of the following is Ed doing in this part of his introduction?
A) Establishing the purpose of his speech
B) Showing his respect for the audience
C) Establishing his credibility
D) Adapting the topic to the audience

C