A conflict of interest involves a person or entity that has two relationships competing with each other for the persons loyalty for example the person might have a loyalty to an employer and also loyalty to family business each of their businesses excepts the persons to have its best interest first
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.
Answer:
I went to the park then I went home
Explanation:
It is a run-on sentence because there is no comma
there is no poem to go with the question