[单选题]
If the acceleration vectq :q26lyl,f fdjqxml i.* 3a7aor of afm o(* mf+teytw7 ()cnaipxcx ,-+ 9lan object is directed anti-parallel to the velocity vect(t+m)cwxit 9x(e+fa*fc ,oa n 7- mylpor,
A. the object is turning.
B. the object is speeding up.
C. the object is slowing down.
D. the object is moving in the negative x-direction.
