I don't remember being asked that particular question. 99% of my FS was "I'm not interrested" (in my town we have about 1/50 witnesses, so people are too often visited). However my honest answer would have been that we can't judge that, and I would have meant it. It was my dilemma too, that if that's the case, then why am I there Good thing I didn't got that question.
Don't you want to be part of those that will for sure be safe?
That's the catch, being a JW ruined my certainty of any kind afterlife. Before that I tried living a christian life, and hoping that by Jesus' grace I will be saved. As a JW I was constantly being reminded, that one can never buy his place, and I can never do enough, can never be good enough to be admitted.