The correct option is “user guide”. A user guide provides instructions on how to use a product, its main characteristics and functions. For example, a TV user guide explains how to turn it on, how to program it and how to solve certain technical problems. In this case the phrase “product encyclopedia” compares an encyclopedia with the user guide as all the necessary information about the product is included there.
I would chose option A, because it includes a statistic that clearly provides evidence of disparity between people with and without disabilities
