<span>C-to establish a mood of gentle anticipation before introducing characters </span>
The prefix of advantageous is ad which means ''toward'' and indicates a direction or tendency.
Honestly all of them but A is the most valid answer since most of us contribute to the entirety of social media.
The answers are the following:
Alliteration - "A damsel with a dulcimer"Personification - "The Sun came up upon the left, Out of the sea came he!"Repetition - "Below the kirk, below the hill,"Simile - "The Wedding-Guest stood still, And listens like a three years' child:" Antithesis - "a sunny pleasure dome with caves of ice."