The correct answer is C. Controlled Nuclear Fission.
Nuclear fission is the process of splitting a large atomic nucleus into two or more smaller nuclei. This process releases a large amount of energy, which can be used to generate electricity. Nuclear reactors use nuclear fission to generate heat, which is then used to boil water and turn a turbine. The turbine generates electricity, which is then used to power homes and businesses.
Nuclear fusion is the process of combining two or more small atomic nuclei into a larger nucleus. This process also releases a large amount of energy, but it is much more difficult to achieve than nuclear fission. Nuclear fusion is the process that powers the sun and other stars.
Magnetic confinement of plasma is a technique used to confine a plasma, which is a hot gas of charged particles. This technique is used in nuclear fusion reactors to keep the plasma from touching the walls of the reactor, which would cause it to cool and stop producing energy.
None of the above is not the correct answer.