[单选题]
What happens to the t2lu1 z dyko;v:j kn*y0rzbf2:otal relativw9 b rz2fcm(*v4/q jbek(g8pg istic energy of a speedy proton when its relativistic mass dk8cpr4qmwbvbfz2j* g( /g9( e oubles?
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.
