The best description of the Big Bang Theory is A. The universe began with cold dense energy compressing into matter after which all matter and energy began rapidly contracting toward each other.

B. The universe began with hot dense energy compressing into matter after which all matter and energy began rapidly expanding away from each other.

C. The universe began with hot dense matter after which all energy began rapidly expanding away from each other.

D. The universe began with cold, spread out matter compressing into energy, after which all matter and energy began slowly moving toward each other