I think the correct answer is accident. Hope this helps!
Answer:
A summary begins with an introductory sentence that states the text's title, author and main point of the text as you see it. A summary is written in your own words. A summary contains only the ideas of the original text. Do not insert any of your own opinions, interpretations, deductions or comments into a summary.
Carbon dioxide am i right
The answer to the question would be B