Think before I answer? You're not my supervisor.
A and C. Possibly B, if it's at a constant velocity and no potholes or speed bumps.
All of them. A is decelerating, B is moving at a constant velocity (no acceleration) and C is accelerating.
Google before you answer.
There, I fixed it for you...
Which of These Trucks Are Driving - Solution
If you are still trying to get the answer to this, we have a hint for you, there are a few different solutions, and all you need to know is basic math to get the equations right. All of these Trucks may be driving. A has a negative acceleration (it brakes). B has no acceleration (constant speed). C has a positive acceleration (it increases speed).
Whew! Showed up late. Discovered the answer was already presented.
I answered it correctly.
Now, prove that I'm lying.
None of them. It's a cartoon.
I'm guessing this is before autonomous vehicles and that neither truck was driving but maybe someone was.