Which one of the following is mentioned in passage A defensive purposes. ... ...

Which one of the following is mentioned in passage A defensive purposes. Many software makers, both but not in passage B?
(A) the amassing of patents by software companies the cost of finding all the patents a product
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in June 2013 LSAT (PT 69): Reading Comprehension