Evaluate the collective function of references cited together in a given text segment.
Classify their combined role into one of the following categories: 'method', 'background', or 'result'.

Text:Limited experience, fear of using of e-books, and other factors may rob users of the full benefits of the technology.(13) E-book producers must address this challenge by taking on the responsibility of educating users about the full benefits of the technology and how they can make full use of these benefits.
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