To determine the correct answer, we would need to analyze how the author introduces magpies in the context of the article. Each option suggests a different approach to introducing the topic:
A. This would imply that the author discusses the defensive behaviors of different species, including magpies, as a common theme. B. This would mean that the author clarifies key terminology related to magpies or birds in general. C. This would suggest that the author poses a specific question regarding magpies that she intends to explore in the article. D. This indicates that the author starts by discussing birds generally and then shifts focus to magpies and possibly other animal species.
If the excerpt includes a clear definition, a specific question, or a broad introduction that narrows down to magpies, we can select the most fitting answer. Without the specific context of the article, it's not possible to conclude definitively. If you can provide more details or specific text from the article, I can help you better determine the right approach.