Final Answer:
The central idea of the article about Benedict Arnold is that his actions during the American Revolution are a complex and controversial part of American history. The correct option is "D. Benedict Arnold's actions during the American Revolution are a complex and controversial part of American history.
Step-by-step explanation:
Complex and Controversial Actions: The correct option is "D. Benedict Arnold's actions during the American Revolution are a complex and controversial part of American history." Benedict Arnold started as a general in the Continental Army but later switched sides and joined the British, making his role in the American Revolution complex and controversial.
In summary, the central idea of the article is that Benedict Arnold's actions during the American Revolution are intricate and controversial, contributing to a nuanced understanding of this period in American history.