Answer:
A. Revise the outline of her research paper is the correct answer.
Step-by-step explanation:
Since Bethany wants to change the organization strategy, letter B is incorrect, but helpful; however, it would only help her correct typos or change syntax but not the organization. If she looked for more sources, she might continue on the same line, just adding information or contrasting it with what she already has, but it doesn't mean the organization will change. Finally, is she changed the research question, the whole paper might change, and not just the organization. That is why Letter A is correct.