Which of the Following Is True of Nuclear Fission but Not

Which of the following is true of nuclear fission but not nuclear fusion?

A) Large amounts of energy are produced during the reaction.
B) The mass of the products is less than the mass of the reactants.
C) The mass number of the product nuclei is larger than those of reactants.
D) Type of reaction used to generate electrical energy.
E) By products of the reaction do not pose serious health or storage threats.