Answer: C. Software products are more easily compared to each other than books.
Explanation: Software contain reasonable amount of information than a book, as softwares exhibit more practical approach hence enabling softwares to harbor more information.
Softwares are more prone to mistakes than books as softwares have to undergo rigorous testing in other roles detect flaws, books are less prone to mistakes.
Software inspection and flaw detection which takes more time, attention and multiple techniques is more tedious than book inspection and flaw detection.