Which of the following situations discusses work in the scientific
sense?
A. A body moves at constant velocity.
B. An object is held three feet above the ground.
C. An object is lifted three feet.
D. A table holds up a 25 pound weight.

I would say A depending on its end location because it you are walking at a constant velocity and conclude the walk exactly where you began, you have used energy, but no work has been done.
Not C because the object begins at ground level and is then lifted above 3 feet, which has a displacement of 3 feet in the y-direction (vertical) but no distance has been traveled.

The answer should be a.