I would say the best answer is B. A subtopic within the main topic
Hope this helps :-)
A of course, Public speaking is nothing without a focused audience.
<span>"I
think he hardly knew what he was saying, for when I asked him what
business he was in he answered, 'That’s my affair,' before he realized
that it wasn’t the appropriate reply. 'Oh, I’ve been in several things,' he corrected himself."<span>Gatsby was rude, and it made Nick suspicious.</span></span>
