Answer:
B. A single location where all matter and energy were concentrated.
Step-by-step explanation:
The big bang theory is what Georges Lemaitre (and other astronomers soon after) explained how the universe began. The idea is that universe began at a single point. Then it expanded and stretched large enough for space to cool and galaxies and solar systems to form. As more galaxy's form, the universe is stretching bigger and bigger. One day it will expand to its limit and jump back together and create another big bang.