Answer:
A: I don't want to do that so no
By asking if anyone will find out, you are basically saying yes. When saying I really shouldn't do it, you are not giving a concrete refusal. It also sounds like you maybe want to. When saying your brother wouldn't want to, you are not saying no, just stating something someone else said. A would be most effective since it is a clear and concrete refusal.
Why do you think this quote is important
The main reason to quote material in your speech is to reinforce your words.
A quotation offers a second voice that echoes your thoughts, beliefs, and claims.
They said it better: Quotations provide a better way of saying things.
They give you a more concise, memorable phrasing for an idea
That's all I know
The first one is the answer I believe
