In my opinion it;s because adults have a too big of an ego. They wall around with the impression that they're older and know more and we should just listen to them because of that. They feel the need to boss kids around. This affects the teenagers in a way that they get real bad attitudes and in some form, this is peer pressure. They no longer feel comfortable to talk or associate with their parent or any adult. <span />
Having no context or story with it, I would say c most likely makes sense
The line "Not for me the fireside, the well-filled plate," creates a scornful tone
I think its what it means to be alone