The proximal end of the clavicle is closer to the
scapula or sternum possibly? ?

Sternum

Explanation:

Proximal end is also called the medial end

It means "close to the centre of the body"

The clavicle ,which is the collar bone joins medially to the sternum ,which is the breast  bone through a joint called the sternoclavicular joint.

The scapula is the shoulder blade and it joins with clavicle laterally.

yes you can receive a shock severe enough to prevent you from releasing the wire from an ordinary outlet with dry hands

either two or three