Final answer:
According to the Big Bang Theory, right after the initial explosion, the universe was filled with only two things: matter and antimatter. These two components interacted, leading to the creation of the galaxies and other large structures seen in the universe today.
Step-by-step explanation:
According to the Big Bang Theory, right after the initial explosion only two things were present: matter and antimatter. This implies that the correct answer to your question is B. Matter and antimatter.
As the universe continued to cool down, matter began to form including atoms and galaxies. However, in the very beginning, there were only two things present - space and time.
Matter is defined as any substance that has mass and occupies space. Conversely, antimatter is akin to a 'mirror image' of matter, in which each particle of matter has an antimatter counterpart with the same mass but opposite charge.
When matter and antimatter collide, they annihilate each other, yielding a massive amount of energy. This interplay between matter and antimatter in the early universe is believed to have given rise to the current spatial structures and distribution of galaxies.
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