Why might the following nuclear reaction not be very good for energy production in a fission reactor?
Fe ? 
Si + 
Mg + 3 neutrons
A. The mass of the by-products is too high, and therefore, the energy released will not be high enough.
B. The material only produces a few neutrons so the chain reaction will not be very efficient.
C. Interatomic attraction between the products will impede the separation of the atoms from the unstable nuclei.
D. The products are not the right size to obtain much energy from the missing mass due to the strong nuclear force.
E. The reactants are too small to obtain energy from the missing mass due to strong nuclear force.
Answer: E
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Fill in the blank(s) with correct word