When giving a speech, speakers must cite sources by:A:Adding a bibliography; it is not necessary to state the sources if you have a typed bibliography to give the teacher or coordinator of the event at which you are speaking. B:Using an oral footnote and citing the materials in the written representation of the speech. C:Including printed sources only in oral footnotes or written documentation; interviews or television shows need not be cited. D: Plagiarizing the source in both the oral and written forms of the speech. 答案: Using an oral footnote and citing the materials in the written representation of the speech.