Final answer:
The sentence that contains an oxymoron is: 'Huey tried to keep his music down to a dull roar, so as not to wake up his parents.'
Step-by-step explanation:
The sentence that contains an oxymoron is:
Huey tried to keep his music down to a dull roar, so as not to wake up his parents.
An oxymoron is a figure of speech that combines contradictory terms in a single phrase. In this sentence, 'dull roar' is an example of an oxymoron because 'dull' and 'roar' have opposite meanings.
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