Yes B is the right answer, to produce a catharsis you are changing the emotion of the readers to show empathy.
When speaking the sentence out loud, it feels most natural to place the comma after large.
Answer: Chad will make a good class president
Explanation:
The most warrant statement is that Chad will be a good class president because of his chess skills that are good for that and that can help him. Chess skills and that he is a chess player are giving him authorization for being a class president. This statement can also be false.
