What kind of listening is identi?ed as listening with a sense of purpose and involvement?

Which statement does NOT sound like a speaker is establishing their credibility?

A) "As a graduate of the Harvard School of Medicine, I can attest to the quality of education you would receive at this fine institution." B) "Two years ago, I was attacked in my home, so I know first-hand about the problem of home invasions." C) "Today I want to talk about the problems, causes and solutions to the healthcare crisis we have in the United States." D) "I have researched the New England Journal of Medicine, where I found articles on this subject."

In using the stock issues in factual argumentation, the opponent should determine whether the advocate has offered proof that is sufficient to show the probable truth of the primary inference about the proposition

Indicate whether the statement is true or false.