[单选题]
How does the mass of0x .h/rhj a5:omuh,c1 b0yuvm x0am w3uzl:g-l 9ho3l the products of a nuclear fusion reaction compare to the mass of the original elemel9 z oulw33xhm-ag :0lnts?
A. greater
B. less
C. the same
D. varies according to the reaction
