Which sentence contains an oxymoron? . a. she was the last person in the class to finish the test.. b. the kid’s toy looked like a battered old sewing machine.. c. jenna submitted an exact estimate of the project costs to her manager.. d. john is too smart to make such a mistake in his classwork..

An oxymoron is a figure of speech that consists of two contrasting ideas in one line or sentence in order to create an effect. The sentence that contains an oxymoron is, Jenna submitted an exact estimate of the project costs to her manager. The correct answer is option C. The words that created an oxymoron in the sentence are "exact" and "estimate".