The sentence that does not use slang or jargon is:
Slangs are some kind of words that are used in informal situations. All the sentences above use slang and jargon, but sentence C does not use such informal language.
All the words used can be applied in formal language. Plopped in that instance means a clumsy way of sitting down. So option C is right.
Learn more about slangs here:
https://brainly.com/question/476021
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