What is the advantage of using a subject directory like the internet public library? (site 2)

One really great advantage of using a subject directory like the Internet Public Library is that instead of just getting a plain alphabetized listing, for instance, the listing you are provided using a subject directory will be active links you can click on to take you to more detailed information, and these links will all be organized already for you by topic.  And, each time you click on a topic, the list of subjects you are then taken to will be narrowed down for you.  You’ll be able to get more and more specific each time you make a selection based upon what link you click/based upon what topic it is you’re specifically looking.

a main idea dna proper infromation

the answer would be c