The word audience is a noun so the answer would be Noun.
The answer is: [B]: was saying all the things .
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Note: A 'prepositional phrase' ALWAYS begins with a preposition.
Answer choice: [B] — "was saying all the things"—is the only answer choice given that does not begin with a preposition.
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Im not one hundred percent sure but i think its to show why we have the declaration of independence.