In the Reaction C + He →

In the reaction C + He → O
how much energy is produced per gram of carbon used?
Masses,in unified atomic mass units are:
C= 12.00000, He= 4.00260, O = 15.99491.
Express your answer in Joules/gram of carbon.

A) 2.10 × 10^{19 J/g}
B) 5.76 × 10^{10 J/g}
C) 7.77 × 10^{4 J/g}
D) 2.80 × 10^{11 J/g}
E) 3.36 × 10^{15 J/g}