The correct option is
- D. Find common ground with the opponents point of view
This is important to keep in mind: no matter what side you are on, you always need to be prepared for counterclaims and anticipate what the opponent might say. You need to research their side as thoroughly as your own, and finally, be able to come to some sort of a "compromise".
Option A is very careless, option B is a dirty trick you might see in a courtroom and it has no place in argumentative essays, and option C is frowned upon, because your arguments need to be based on logic, instead of manipulating the audience by appealing to their emotions.
