In order to become a scientific theory the three
categories that it must pass are the following:
1) Can the phenomena be recreated in a laboratory setting?
2) Can variables be changed, yet still result in like observations?
3) Is the phenomena truly natural or was it the result of a man-made force
enacting upon it?
Answer:
It's cheap to make, and its recyclable
D, It is a flow of protons, is the best answer. Electricity is the flow of electrons, not protons.
