I believe its both but if I had to choose one I'd say
you should not chew gum in class because it's rude
Why:
It makes it look like your uninterested and not listening
If you have a cell phone yes, most students would use it for social media but it may also be used for school related topics.
I mean you may be physically free but mentally captured. For example, you work at a restaurant and you are free to leave whenever you want, but your boss treats you badly. He's always in your head and thoughts because you know that if you don't please him he might fire you and you need your job. Another example could also be that you are physically healthy but mentally ill. For example: You may have multiple personalities and even though you don't have a wounded leg or arm you are internally enslaved to the other personalities which tell you what to do. These are just a few examples of how you can be physically free and at the same mind enslaved.
I believe that the answer to this might be C
