To prevent more work later
To ensure a proper works cited
To prevent any accusations of plagiarism
To ensure that all sources are always accessible
Look at context clues in your sources
Well a digression is a temporary departure from the main subject in speech or writing. So because the person writing the paragraph getting ill last year has nothing to do with this years cookie sale, I think you are correct, sentence 3 is an example of a digression. So D is the answer.
Snow , because snow melts away pretty fast
