The true statement would be option D; Nuclear Fission Has Occurred.
A nuclear fusion is a reaction in which two or more atomic nuclei come close enough and form one or more different atomic nuclei and subatomic particles.
During nuclear fusion, a huge amount of energy is released.
In a nuclear fusion reaction, the mass of the reactants is more than the mass of the products.
Hence, The true statement would be option D; Nuclear Fission Has Occurred.
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