Hi there!
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I believe your answer is:
D)

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Here’s why:
- A trinomial is a expression that consists of three terms.
- A term can be a number, variable, or both numbers and variables that are multiplied together.
- Answer choice 'D' has three terms, c², 'c', and '6'. Therefore, it is a trinomial.
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Hope this helps you. I apologize if it’s incorrect.