The correct answer is A. Statistics
Explanation:
Supporting material is any type of material or information that helps the speaker to support and prove his ideas as valid during a presentation or speech. This includes anecdotes, scientific articles, experts' words, examples, personal narratives, and statistics. Additionally, the type of evidence or material that is used mainly depends on the level of formality of the speech and the purpose of it. In the case of formal speeches that aim at persuading the audience and rely on facts the speaker would need to include only supporting materials that rely on facts and objective evidence rather than personal narratives, informal examples or anecdotes that rely on the author experience as in this case external evidence would show the audience the ideas of the speaker have been proved or proposed by others. Thus, the supporting material to use in a persuasive speech addressing a question of fact that would be most appropriate is statistics.
