During the speech introduction, the audience decides whether they are interested in the topic and the speaker. to build credibility, a speaker should establish his or he

qualifications

Explanation:

To attract the  audience and to make them interested in the topic of your speech, a speaker should give a first good impression at the speech introduction. There various ways to start a speech that would gin immediate attention like quotes, shocking statements, etc. Equally important is to establish a credential position by the speaker. He should tell his audience about the knowledge and credentials he holds to increase his credibility to speak on that topic.

yes. it has been proven significantly, especially with a more than ever huge influence of social media & everybody's opinion. for example, we could bring up movements such as the black live's matter movement, or something as such as the march for our lives movement. more than ever it seems as though everybody is starting to care more about this world.

the answer is:

c. economic output