[单选题]
An object is moving wihgzf +b:fu3*ghsbc2 1th constant non-zero acceleration in the +x axis.xetupu +1uukmz w(*-n:ha:l 0 The position versus time graph of this object uz 0uxtn +uuepw1*:a:hlkm-( is
A. a horizontal straight line.
B. a vertical straight line.
C. a straight line making an angle with the time axis.
D. a parabolic curve.
