Answer:
Option B is correct
Explanation:
The amount of time it takes to complete a reading assignment is not concerned with publishing year of the book (it might be published already).
The amount of time it takes to complete a reading assignment is also not related to the cost of the book (it might be purchased already)
The amount of time it takes to complete a reading assignment is related to the number of pages. Because if you complete a reading assignment, you might need to read all of the pages in the assignment.
Hope this helps!
:)