Answer:
A.a space station orbiting Earth
Step-by-step explanation:
As we know that kinetic energy given as
K.E.=1/2 m v²
Where m= mass
v= velocity
If the velocity of the object is zero then it posses zero kinetic energy.
We also know that when object at a height from the ground or from a reference line then it posses potential energy and it does not have kinetic energy because object is in rest position.
In the option B and C system is in rest position that is why these type of system posses zero kinetic energy.
So the answer is A.
A.a space station orbiting Earth