Which of the following is a true statement?
a. articles are better lead generation tools than either e-books or white papers.
b. e-books and white papers have a high perceived value.
c. e-books are typically distributed offline.
d. e-books are primarily used in b2b marketing.
e. successful white papers include a sales message.

B) E-books and white papers have a high perceived value.

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.  

in terms of experimental research, mcdonald’s charging different prices in the two cities relates to

d) social security number

let me know if i am correct or not, so i can edit the answer.