Which Statement Concerning Nuclear Reactions and Chemical Reactions Is FALSE

Which statement concerning nuclear reactions and chemical reactions is FALSE?

A) Nuclear reactions involve changes in the protons or neutrons in the nucleus of an atom.
B) Chemical reactions involve changes in the valence electrons of an atom.
C) Nuclear reactions usually result in a change in the identity of the radioactive isotope.
D) Nuclear reactions are capable of producing more energy than chemical reactions.
E) Chemical reactions always occur much faster than nuclear reactions.