Final answer:
The most effective revision that improves the professional tone of the text is option D: Change sentence 5 to: Implementing several of these systems could remove garbage from the oceans.
Step-by-step explanation:
The most effective revision that improves the professional tone of the text is option D: Change sentence 5 to: Implementing several of these systems could remove garbage from the oceans. This revision removes the casual and informal language in the original sentence and replaces it with a more formal and professional tone. It also provides a clear and concise statement about the potential impact of implementing multiple systems to remove garbage from the oceans.