I would saw B. I choose B because translational motion is an object that shifts between one place to another.
Copper is a chemical element having atomic number 29 and represented by the symbol Cu.
The electron configuration of copper is 1s2 2s2 2p6 3s2 3p6 4s1 3d10 and copper will share one atom from s orbital as it can hold two electrons and form one bond with other atoms to become stable.
Think of it like this. If you have a cart full of heavy potatoes, it would be hard to push the cart. That is inertia. Because of its weight and gravitational pull, there is inertia.
Ground state, since electrons want to be in the lowest energy position as possible, which is closer to the nucleus of the atom.