All of the Following Statements Are True EXCEPT

Multiple Choice

All of the following statements are true EXCEPT

A) the Sun's energy comes primarily from the fusion of hydrogen.
B) fusion reactions have high activation barriers due to repulsion of nuclei.
C) fission reactions have relatively low activation barriers because uncharged neutrons used to initiate the reactions are not repelled by nuclei.
D) magnetic fields can be used to confine nuclei during a fusion reaction.
E) many fission reactors have been replaced by fusion reactors,which produce more energy and fewer waste products.