I don't know how they work, but ask them to give you a chance to review everything before sending. Triple check everything. If some answers they put don't make sense, ask VJ community here to review them. If your gut tells you there's something incorrect, trust it.
In the past, you had a chance to correct answers during interview.
Nowadays, majority of interviews for AOS are waived. Meaning if you get approved on the wrong premise and get your GC, any serious discrepancy in answer can get you in trouble later during I-751 or even when naturalizing. The worst nightmare is for USCIS to accuse somebody of misrepresenting themselves at late stage of immigration and potential of losing GC after having it for 3-5 years.