With respect to what created the universe, the question what came before that doesn't have a satisfactory answer as it leads to an infinite regression of what came before that.
So the only solution to the first cause conundrum of what came before that is "no thing" because only a "no thing" can...
cosmic background radiation
energy
first law of thermodynamics
friedmann's solutionsto einstein's fieldequation
matter
quantum mechanics
red shift
second law of thermodynamics
space and time
universe