Class of Admission
There is confusion as this was a new entry in the AP form, which USCIS never clearly clarified.
Different attorneys may have different opinions as always.
USCIS is interested in your current status, which may have changed from the last entry. Example in my case the last entry was H1b and wife's was H4. In my last (third) I used as : ADJUSTEE, since this is my current status. Both were approved.