OP, has your DD also been rejected from Oxbridge? It's very hard for them when these things happen.
Sometimes though, the world works in odd ways. Some years ago, my DD was rejected from Cambridge in the Jan. Always knew that was a long shot and was ok with that, Second choice was LSE, but she was rejected there too in late April and this hit her much harder - mainly because the waiting had been so drawn out.
She was offered Durham, A star, A,A, but didn't really want to go that far north. (!) She was offered Bath, but it was a reduced offer due to her EPQ (something like ABB) and she was aiming for 4 A stars (and had 11 9s at GCSE) so she felt like there would be no point trying if all she had to get was ABB. She was also offered UCL, A star, A,A, but wasn't sure about that due to accommodation issues there and what she perceived the impersonal feel of the place.
Anyway, after the LSE rejection, she decided to take a gap year and reapply. She had an amazing year travelling / working around the world. Also, she got into Oxbridge second time round. She now says thank god LSE turned her down because if they hadn't, she would be there now and would never have got out of London.
Might your DD consider a gap year if she not excited about any of her offers? Applying second time around it much easier because they're not in the midst of coursework / exams and they know where they stand grade-wise. As long as she has a solid plan for a gap year, it can be hugely beneficial. Sometimes a setback can be a redirection that happens for a reason (in retrospect at least)!