Answer: The right answer is the B) A short video clip.
Explanation: Just to elaborate a little on the answer, it can be added that a simile or metaphor, which can be used as part of a speech, are rhetorical figures or figures of speech, but not types of media. In addition, a quotation or a piece of evidence (which could certainly be extracted from a newspaper, or from the Internet, both regarded as media) can also be used to enhance a speech, but they are not types of media in themselves. I would contend, therefore, that only option B is right, since media refers to a means of mass communication, and a video clip, which is often meant to be broadcasted in the TV or the Internet, can be regarded as such.
Does it have to have a certain topic? Or can it be about anything?
Explanation:
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The statement that best supports the author;s claim is: "Parents are supportive of public schools adopting school uniforms for several reasons; the most common being affordability." (last option)
In the passage the author claims that "(...) uniforms allow students and their parents to save money (...)". The author explains that parents spend money on uniforms at the beginning of the year, but such investment would be much greater if students had to wear their own clothes to school.