[单选题]
As the speed of a particle applvc5 -ft0 qadd9o3e.khdb:05f:ff:s icg 8 ubroaches the speed of light, the momentu9z-jwymxla +jy lde* u;(.5dym of the paw xdl y.d5*y(z-yule+aj ;9mjrticle
A. increases.
B. decreases.
C. remains the same.
D. approaches zero.