Your tone
Let's look at the other choices first. Your credibility is your ability to be believed as trustworthy in regards to the subject. Whether you're talking to a group of teenagers or professional adults, your credibility doesn't change. Your clarity also should not change based on the audience because you want to be clear in your message at all times. Also, your purpose should be the same no matter the audience. The only thing that would change is your tone. The way you approach a crowd of teenagers would vary greatly from the way you'd approach a room of professionals.
What are the choices? It'll be simpler like that.
Answer:
D. It is a very rewarding work
Explanation:
A is in first person, B is not a statement and it does not get the point through politely, and C kind of goes off topic talking about the people not the volunteer work. Therefore, D is a simple clear statement that establishes your position. Hope this helps :)
Answer:
say that it kicked you out if class and you where trying to get back in
