did you open it up before buying the condo? Does the bank know that you have since bought it? If you bring proof of ownership to the bank, you should be fine.
I just got approved in Hanoi and I had a flexible ticket, but they never asked to see my return flight, so option A would have been feasible for me as well.
if you have injuries or things you cannot do I am sure they will adjust to your capabilities. They are very nice and I’ve never had any issues or have any complaints