[单选题]
An object moving in the +x axis experiences anmal4a;a)if (w ejgg a0x: 83p9,c46vs 6mtggtk6umq6yy j 1 en acceleration of $2.0 \; m/s^2$. This means the object is
A. traveling at 2.0 m in every second.
B. traveling at 2.0 m/s in every second.
C. changing its velocity by 2.0 m/s.
D. increasing its velocity by 2.0 m/s in every second.
