[单选题]
What happens to the total relativix);cbi sxbs aco8r5gi2-jh 6 *stic eneod* ut34 v)oxi- voej/rgy of a speedy proton when its relativistic masjeodi*4o/3-vxo uv )ts doubles?
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.
