The answer, in my opinion, is the second sentence, "The coach who is an expert in the sport explained the revised rules to us". Here, the "Who is an expert", is presumably the nonessential clause.
I believe that the answer is D. The general purpose of the speech is that you provide an argument for a topic with your support and provide counters to the counter arguments for the topic itself. Your main purpose should be to prove the audience believe that you are correct in what you are explaining and talking about.
Answer:
Devil ohh...... ohhhhhhhh...... ohhhhhhhhhhhhhhhhhh nooooo
Explanation:
B Because its your fault if you don't read it and