[单选题]
How does the mass of the products of a nucler2 nsh k2jy/7tar fusiokxp-qvt1 ,5) qgzwdeq,g4d e43s q/ imn reaction compare to the mass o,qiqq exzg,1ps4) mgdwq35 dtv e /-k4f the original elements?
A. greater
B. less
C. the same
D. varies according to the reaction