When are added to an atomic nucleus, energy is produced and this is called a fusion reaction.
a. protons
b. neutrons
c. protons or neutrons
d. protons, neutrons or electrons

When neutrons are added to an atomic nucleus, energy is produced and this is called a fusion reaction. The answer is letter B. To be exact, two nuclei combine to produce a more stable nucleus. The positive charge on both nuclei result in a large electrostatic energy barrier to fusion.

The correct answer is c because the nuc are combing more protns and neutrons. The answer suposed to be protons and neutrons NOT PROTONS OR NEUTRONS?!!