[单选题]
What happens to the kinetic energy of 9dxjkuv1a0nd1/ u0eh(6 m c4szk* rqga speedy proton when itswa/p gy u lp3k75wpljs3f((w4 relativistic mass d p w (kpuysg/jw(3pl3a45l7fwoubles?
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.
