Extemporaneous delivery is the form of delivery where a speaker carefully prepares, rehearses, and delivers the speech using limited notes.
What is extemporaneous delivery:
A speech can be delivered using four methods: memorized, impromptu, extemporaneous, and manuscript. Under the extemporaneous style, the speaker does not completely write out the speech. Instead, the speaker delivers the speech by using keynotes for reference. The speaker decides their phrasing, words, and organization of the speech beforehand to prevent themselves from fumbling or rambling. The key benefit of the extemporaneous style is that it provides the speaker with a lot of flexibility, allowing them to incorporate any references from their immediate surroundings, the day’s news, etc.
Learn more about the styles of delivering speeches here:
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I think the correct answer is D. Because, of course, every integration is difficult in the beginning, but as time goes by, it gets easier, and it is the only way both cultures can survive. If they don't succeed in integrating, this will inevitably lead to a war in which many people, if not a whole culture, will be annihilated.
Sentence 4 is the one that uses the correct format for a parenthetical citation.
Parenthetical citation is used in an essay or a paper in order<u> to indicate that the information presented comes from another source</u>. It works as a way of giving credit to the real author. Furthermore, in a parenthetical citation,<u> both the author and page number are cited in parentheses and always in that order</u>. <u>Sentence 4</u> is the correct option since it is the only one that <u>provides first the author and then the page number in parentheses</u>.