Hi,
the original question was about which landing capability you get with a slat/flap locked, which is CAT 1 as you can understand by reading the landing with slats/flaps jammed paper checklist. Now it is obvious that as a commander you will choose the safest course of actions, in the event that you get a slat/flap locked and you don't have enough fuel to reach an alternate airport with CAT I minimums. What happens from now on, it's PIC judgement. The top one priority is always to be safe. But for the original question, A/P down to 500 ft AGL. Can't see many other ways of reading it.
Cheers.