''Don't tell the coach ; he's as hot-tempered as a kettle.'' is the sentence that contains the best example of a simile. Therefore, the option C holds true.
A simile is a figure of speech, which is generally used or expressed in a sentence where a similarity or comparison between two different things is to be indicated. It is typically used in sentences that involve a use of figurative language, which may or may not be in a poetic way.
Only the third sentence contains words like 'as' to show the similarity between the coach's hot tempered behavior and the temperature of a kettle. Thus, the third sentence can be implied as a perfect example of a simile as a figure of speech.
Therefore, the option C holds true and states as a perfect example of a sentence containing simile.
Learn more about a simile here:
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