Final answer:
Juxtaposition is when contrasting elements are placed close together to highlight differences, often used to emphasize key points within a text. It's a common literary technique in exposition, rising action, and climax of a narrative.
Step-by-step explanation:
Juxtaposition is A) when authors use contrasting examples to draw attention to key points. This literary technique involves placing two elements close together to highlight their differences. The extra emphasis given to this comparison helps the author make a point or create a certain effect within the text. For example, an author may juxtapose a character's action with another's to highlight the moral contrast between the two.
In narrative structure, the role of juxtaposition may come into play during the exposition to establish different characters or settings sharply against one another, or during the rising action to enhance the conflict. It can also be used effectively in the climax of a story, revealing stark differences in characters' reactions to the peak moment of tension.
Understanding juxtaposition is part of a larger effort to analyze how a text is organized, including why chapters end where they do and how text divisions contribute insights into the plot and theme of the story.