Compare and contrast nuclear reactions and chemical reactions

Chemical reactions involves the making and breaking of bonds between atoms while a nuclear reaction involves changes in the nucleus of atoms.

Explanation:

In a chemical reaction,the energy release is just a matter of a few kilojoules but nuclear reactions release tremendous energy in megajoules capable of destroying entire cities. Chemical reactions are affected by temperature and pressure of reactants but a nuclear reaction is unaffected by those factors. A nuclear reaction could be self sustaining as long as the reaction is carefully controlled.

i believe the answer is a.