Answer:
The correct option is C.
Step-by-step explanation:
Nuclear fusion is a radioactive reaction - radioactivity involves the nucleus of an atom NOT the electrons. Nuclear fusion is the process in which two or more light atomic nuclei combine together to form a heavier atomic nucleus with the release of large amount of energy.
An example of a nuclear fusion reaction is shown below
³₁H + ²₁H ⇒ ⁴₂He + ¹₀n + energy