It's option 4, prompt as the phrase 'i always made sure to show up on time' means on time
I would say C is the correct answer
Most schools ban soft drinks from student vending machines. It happened when Obama was President & his wife Michelle Obama decided to get rid of all unhealthy food & drinks at schools. Most schools today still observe a healthy diet in schools today.
It could be stated that she seems to be "bitter" about life, she does not like Calpurnia bringing those white kids to their place, their church. She might believe that "segregation should be a two way street" and the congregations seems not to agree with her.
She was probably placed in that scene in order to contrast their way of thinking about segregation.