"Life for me ain't been no crystal stair" shows that the mother didn't have an easy life and had to work hard at everything.
Hope this helped! Let me know if there is anything I need to clarify or explain more in depth
While I believe that both A and D are correct, the best choice here would be A
The sentence which is the most objective is <span>A. My mother taught Italian lessons at the community center.
</span>It is a fact, therefore it is objective. The other sentences are somebody's opinions - stupid sisters, crazy Greek family, a real pain - these words show that it is someone's opinion, which is subjective, not objective.
The thesis seems to focus on America's school lunch system is lacking in nutritional value as well as clean selections.