[单选题]
If the acceleration of an o9m2ev jyki -v9+3vc sc6xc3tvbject is always direct-;tch k azfsc y2gi6;3ed perpendicular to its velocity,6 a 3-g z;ysckfit2;hc
A. the object is speeding up.
B. the object is slowing down.
C. the object is turning.
D. this situation would not be physically possible.
