Concept:An opposite in meaning, or antonym, is the choice that expresses the most direct contrast to the underlined word.
Explanation:The underlined word in the question is "plagiarized."
It describes a piece of work that has been copied from another writer and presented dishonestly as one's own.
To plagiarize means to take someone else's ideas or writing and claim them as your own.
The exact contrary of copying another person's work is doing something "original."
An original work is one that is newly created by the author and was not taken from any existing source.
Therefore, "original" carries the meaning that is opposite to the underlined word.
The other options do not show this direct contrast with the idea of copying.
"Annotated" means supplied with explanatory notes, while "used" means already owned or employed, and "revised" means changed or edited.
None of these meanings opposes the idea of plagiarism.
So the correct choice is the one that means "original."
Answer:C. An original.