Imagine you are riding on a train. Which object will appear to be stationary from the train seat? A. A building outside
B. A poster on the train
C. A passenger walking down the train aisle O D. A tree outside

C. a passenger walking down the train aisle

Explanation:

I just got it right on apex lol

B. A poster on the train.

Explanation:

If you imagine this, everything else is moving, except the poster.

Also, I got it correct on a-p-e-x

If you dont believe me, look at the comments on the other persons answer.

not too sure maybe olecranon process