RFE,
Did she use AP to re-enter USA? If so, just send photcopies of stamped AP and entry stamps on passport.
If she never used AP to reenter USA, technically she is not in AP yet. In that case AP is irrelevent for this RFE. Send phtocopies of her last I-94 and visa stamp.
I feel people who enter country with AP they never get RFE asking for "current status". I guess BCIS has better tracking or status checking system for people who enter in AP/GC (and probably that was one of the reasons for not asking AP users for special registration). But this is just my guess though.