The first option, "Libraries are working hard to remain in business in the digital age by expanding their offerings," can be inferred based on the provided information. It suggests that libraries are adapting to changes in how people consume information and entertainment by broadening what they provide.
The other options make assumptions or conclusions that may not be supported by the information provided. For instance, stating libraries are no longer necessary or should focus solely on music does not reflect a balanced view of libraries’ roles. Similarly, charging people money is a specific suggestion that does not necessarily follow from the idea of libraries adapting to the digital age.