[单选题]
What happens to the total relativisti*q i,nnh5ql(g0qfd2r c energy of a speedy g odd)u)o n1*xo.w ey2proton when its relativistic mass dou *goo.yu d1d2eno )xw)bles?
A. It doubles.
B. It more than doubles.
C. It less than doubles.
D. It must increase, but it is impossible to say by how much.
