Answer:
C
Explanation:
remember that force is basically the change in energy. A might seem right, since there is no force on the object, but remember that the object might already have energy, and saying that the net force is 0 only says that the object's energy isn't changing.
B is not right, because the object won't slow down if its energy doesn't change
This leaves C, which is right because it correctly states that an object won't change its speed if there is no change in energy.
