The Following Nuclear Reaction Is an Example of ____ $4_{1}^{1} \mathrm{H} \rightarrow{ }_{2}^{4} \mathrm{He}+2_{1}^{0} e$

The following nuclear reaction is an example of ____.
$4_{1}^{1} \mathrm{H} \rightarrow{ }_{2}^{4} \mathrm{He}+2_{1}^{0} e$

A) fusion
B) fission
C) gamma radiation emission
D) beta emission
E) hydrogen combustion