Answer:
Editing for content
Explanation:
Vincent is reading over the paper that he has written. He realizes that he went off on a bit of a tangent, and one of his main points does not line up with his thesis statement. This was discovered while Vincent was editing for content.
Editing for content is also known as heavy editing, this type of editing involves checking to see if the content of the write-up is okay and in-line with the topic of interest and any unnecessary content is removed.
