Obviously a professional work environment is not meant for her level of mental impairment. She might prefer to work in a program on a farm where she's with people her own age and gets to spend time taking care of the farm animals. It'd be therapeutic for her. One of my closest friends has a mental disability and a learning disorder, and she absolutely loved working on the farm through a Ticket to Work disability program. Most of the other kids in her program were her age or younger, and every time we hung out she'd happily chatter about the momma piggies and the babies piggies and the flowers and veggies she grows and how she helps her group mates take care of the animals. I think Ruby would like working on a farm far better than a professional position, and yes, I question why her case manager thinks a retail/fast food position is best for her when she simply cannot handle that level of functioning.