In order to renew my Inspection Authorization I have to take eight hours of training every year. I use an online course which is pretty good. There is a menu of about 35 topics and you choose eight from that. The categories are mostly technical, but there aqre a few regulatory topics as well. I stupidly chose a regulatory topic which I was actually interested. Big mistake. All the questions are mired in the regulations which may come from multiple places. Anyway , this is the only question I missed. The correct answer is A. Who knew? I sent some feedback to them saying the question was ambiguous. Not that big a deal since I passed. It just irks me.