Often I skip answering a survey halfways, either because of lack of relevant options (e.g. only Yes/No to a question that can be answered in multiple alternative, relevant ways), or because I have to answer a question which simply makes no sense.
This one is no exception. As you can see from the screeen shot, I’ve answered “I have no blog” to the first two questions, but then the third question asks me what I’m using my blog for. And I can’t get to the next page in the survey without checking one of the two irrelevant options.
For the same reason I can’t see if there are more questionable questions later in the survey.
So I think you have to redo this one…