True, Other people will take advantage of you if they see the chance... Its human nature
I would say A and B because it has quotes around it making it seem like someone is saying it.
We can infer from Gregor's thoughts that his employer has a tyrannical streak, since he relishes making his employees fell diminished. He places himself on top of his table in order to speak to his employees (who sit on a chair) from above, using this position to intimidate them.
