[单选题]
An object moves in a direction paralll:wx yn4oi7k5el to its length ,f fh ly5eesk5(7tla0with a velocity that approaches the velocity of light. The width of this object (kt ,yfsh5l75ae0f le, as measured by a stationary observer,
A. approaches infinity.
B. approaches zero.
C. increases slightly.
D. does not change.