[单选题]
As a freely falling ob0)e e+t ugvyb j7jm.x)ject speeds uppj7k-kwwwgpe;.qv bs z+7.dyx66l, n, what is happening to its acceleration, how does it dbwswv+yz6 k;..w 7x7,p6 e pqnkg lj-change if air friction is ignored?
A. keep the same
B. increase
C. decrease
D. hard to tell
