What Energy Must Be Added or Given Off in a Reaction

Multiple Choice

What energy must be added or given off in a reaction where two hydrogen atoms and two neutrons are combined to form a helium atom? (Atomic masses for each: hydrogen,1.007 825 u;neutron,1.008 665 u;helium,4.002 602 u;also,1 u = 931.5 MeV/c²)

A) 20.7 MeV added
B) 20.7 MeV given off
C) 28.3 MeV given off
D) 28.3 MeV added