PT 65 S3 Q11

Which one of the following describes the author’sprimary purpose in ... ...

Which one of the following describes the author’s primary purpose in mentioning the fact that a wide variety of images and documents can now be stored electronically (lines 19–23)?
(A) to provide evidence to justify the assertion made in the first sentence of the passage
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Dec 2011 LSAT (PT 65): Reading Comprehension