Answer:
B) E-books and white papers have a high perceived value.
Step-by-step explanation:
E-books and all books in general have a high perceived value. Thankfully consumers still value the effort and work put into writing a book, and their sales numbers are increasing (at least in the US).
Consumers value white papers not only for their content but also the philosophy and point of view of the author. You might like some reports and dislike others depending on your personal opinions but the fact that they exist is very valuable.