For Purposes of a Practical (Energy Producing)reaction One Wants a Disintegration

Multiple Choice

For purposes of a practical (energy producing) reaction one wants a disintegration energy Q that is:

A) positive for fusion reactions and negative for fission reactions
B) negative for fusion reactions and positive for fission reactions
C) negative for both fusion and fission reactions
D) positive for both fusion and fission reactions
E) as close to zero as possible for both fusion and fission reactions