The appositive is a renaming of a noun, something that can be skipped without changing the grammatically and meaning of the sentence.
Here the appositive is "Dr. Walters" - it can be skipped:
My dentist was one of the speakers at Career Day
and it renames "My dentist" - answer B
Answer:
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Explanation:
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I think it's C) repetition
The gay marriage campaign in australia. the No campain tries to use parental emotions as a way to persuade viewers to side with them
By announcing before, during, after the broadcast that the program was fictional