Ill try but i think your reffering to Goosebumps.
I am pretty sure it would be massive because it is an English question. If you are doing a multiple choice question you should see which one fits the best. If could also be positive impact.
The correct answer is: [A]: "noun" .
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The italicized word: "<em>audience</em>" ; is a: "noun" .
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Essential, both mean something is very important
That would be irony
irony : use of words to express something opposite of the literal meaning.