The prefix or root word "cand" means to be of brilliant whiteness, shine, or to be hot. Then the five words have different meanings but all of them related to one of these terms in a literal sense or metaphor, all of them have the quality of shine or light either the place where they are or themselves in the case of the words related to living things.
I would say A,. Electronics in the classroom negatively effect (not effects) the learning environment. This will then be your reason for your entire paper, allowing you to back it up easily