Short Answer 
To identify the central idea of a text, understand the main points or messages the author conveys. After grasping this idea, analyze the available options to select the one that best reflects the author’s arguments, ensuring that your choice accurately summarizes the overall theme of the passage.
Identify the Central Idea
To determine the central idea, first, recognize that it encapsulates the main points or information an author aims to convey in a text. This could relate to the author’s perspective, the events discussed, or the overall message intended for the audience. Understanding the context is crucial for grasping the primary theme of the passage.
Analyze the Options
Once you have a grasp on the central idea, evaluate the available options to see which best aligns with your understanding. In this case, option C stands out, as it directly addresses the impact of inaction faced by the people of Athens—the key argument made by the author. Be sure to compare the options carefully to ensure that the one you choose accurately reflects the main points discussed.
Conclude with the Best Choice
Finally, confirm that your chosen option—here, option C—adequately represents the main idea of the passage. This choice should not only summarize what the author is trying to convey but also capture the essence of the arguments presented throughout the text. A successful match will enhance your comprehension of the reading and clarify the author’s message.