Answer;
(C) big bang theory
-The origin of the universe remains a question. The most accepted theory, that suggests our universe started as a hot, dense, compact singularity and suddenly expanded explosively into existence, is called the big bang theory.
Step-by-step explanation;
-The Big Bang is a scientific theory about how the universe started, and then made the stars and galaxies we see today. According to the theory the universe began as a very hot, small, and dense super-force (the mix of the four fundamental forces), with no stars, atoms, form, or structure (called a singularity).
-The Big Bang hypothesis states that all of the current and past matter in the Universe came into existence at the same time,about 13.8 billion years ago. At this time, all matter was compacted into a very small ball with infinite density and intense heat called a Singularity. Suddenly, the Singularity began expanding, and the universe as we know it began.