I Believe the answer is Carrying the box because he isnt using any force like having to (Pick up) , (Pushing) or (Pulling).
Hope this Helps Dante -
Hi,
The answer you are looking for is
A.
a person carrying a box from one place to another
This is because the box is being carried at a constant velocity so, there is no force it needs to keep it it motion.
Have a great day!