Based on the information provided in your question, it appears that the main idea centers on libraries adapting to the digital age and maintaining their relevance. The only inference that can be reasonably drawn with a focus on that central theme is:
- "Libraries are working hard to remain relevant in the digital age by expanding their offerings."
This statement aligns with the idea that libraries are adapting to the changes brought by digital technology, rather than suggesting they should charge fees or shift their focus entirely.
As for the second part regarding the student’s evidence about roller coasters, if you have specific choices or examples of evidence that the student is using to support their central idea, feel free to provide those, and I can help analyze them in relation to the central idea presented.