<span>The most unpredictable presentation aid a speaker could use is a person or an animal.
Presentation aids are things other than the expressions of a speech that are utilized to support the goal of the speaker. Specifically, they can be visual aids, sound aids or other supporting innovation.</span><span /><span>
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<span>The correct answer is C. Tournament pay :)</span>
B. It involved exchanges with traders from China and Southwest Asia. So they aimed to control the trading routes rather than having subjects.