davejoe

That is the second part of a 2-part question. The first part is "Have you ever applied for employment authorization before?" Then you tell them what happened. If you have not applied before, then you say "No" and N/a for the follow up.

(c )9. No fee when filed together with I-485 - this is all explained in the instructions, and in the VJ guide for AOS as well..
Also, for future reference, it is always a good idea to post the question from the form. That way people won't have to do and download the form to see what q.16 in form I-765 is before they can answer your question.