Question

question 8
when offering supporting material in a speech, the speaker should ensure that:
the evidence is from an objective source
the evidence is common knowledge
the evidence comes from a credible source
the evidence is from a well - known source

Explanation:

In speech - making, when using supporting material, the key is the credibility of the source. A credible source is one that is trustworthy, reliable, and has expertise or a good reputation in the relevant area.

• An "objective source" is not the best choice because objectivity alone doesn't guarantee the quality or reliability of the evidence (a source could be objective but not credible, like an unknown individual with no expertise giving an objective opinion).
• "Common knowledge" is not a requirement for supporting material in a speech. Speeches often use evidence from research, expert opinions, etc., which are not common knowledge.
• "Well - known source" is not the right criterion. A source can be well - known but not credible (for example, a well - known but disreputable tabloid). So the most important thing is that the evidence comes from a credible source.

Answer:

C. The evidence comes from a credible source