This question made me laugh as a part of me wondered if it was a legit question.
The definite wrong answers are B and D. Never, ever, do either of these, you will get into a serious amount of trouble from your school, family and friends and you could risk losing friends, family respect and be disciplined by your school. Not to mention the embarrassment and hurt you would cause yourself and the others involved. Don't do these things.
I would say C would cause the least negative amount of negative consequences.
A might seem harmless because you are sharing a video of an educator, a person in authority, discussing a topic that is common during sexual education in Highschool that other students will have already participated in during the lesson and you aren't sharing anything personal or private. However you will get in trouble for doing this because you are sharing something that you shouldn't have filmed in the first place during a lesson and you filmed the teacher without their permission and shared it online without their permission which you could be taken to court over. It's a violation of privacy. You might also get expelled or disciplined.
C might get you bullied which is an obvious negative consequence but then if you believe enough in what you wrote in your essay and you have the courage in your convictions it shouldn't be a problem. Plus it's your property that you are sharing online so you won't get in trouble with any authorities.
