you exist, the particles/energy which created you exist, physics exists.
and your option A and B theory has for the most part been disproved. Einstein's theories lead to the conclusion that there was a beginning to the universe, hence it must've been created somehow.
If you take that previous idea that universal membranes collided, then those membranes had to come from somewhere, and those universes had to be created at some point by something... if you keep tracing it back it appears that we only get closer to option of something superior creating everything. (it's not only a question of the particles that are before us, but the energy which created them and the creation of the laws which guided these processes)
There may be fallacy in our sciences or something that has been undiscovered, but as to our knowledge to date, it seems that something greater than us created everything, IMO.