What is the author’s purpose in writing this article?to prove that Mrs. O’Leary’s cow started the Great Chicago Fireto provide general information about the Great Chicago Fire and theorize about how it beganto describe Mrs. O’Leary’s experience of living through the Great Chicago Fireto convince readers that the Great Chicago Fire was the deadliest fire of the 1800s

Without the context of the article, it's difficult to definitively determine the author's purpose. However, based on the options provided, the author's purpose could be:

• To provide general information about the Great Chicago Fire and theorize about how it began. This option suggests that the author is presenting facts about the event and also offering theories or hypotheses about its cause.

• To describe Mrs. O’Leary’s experience of living through the Great Chicago Fire. This option suggests that the author is focusing on the personal experience of a specific individual during the event.

• To convince readers that the Great Chicago Fire was the deadliest fire of the 1800s. This option suggests that the author is making an argument or presenting evidence to persuade readers of a specific viewpoint.

• To prove that Mrs. O’Leary’s cow started the Great Chicago Fire. This option suggests that the author is trying to establish a specific cause for the fire, potentially using evidence or argument to support this claim.

Without the actual article, it's impossible to choose the correct answer. You should refer back to the article and look for clues about the author's main focus or argument, the type of information presented, and the overall tone and approach of the piece.