[单选题]
An object moves in a5tj wrpnx4/ jzl)md ;qzpf 62.tibl16 /3h2b imt2vrf direction parallel to its length with a velocity that approaches the velocity of light. The width of this object, as measured by a stahm2 rb2v3 t/iftionary observer,
A. approaches infinity.
B. approaches zero.
C. increases slightly.
D. does not change.