Answer:
There is no text or any following statements so I cannot help you. Sorry.
Look up any of his books and check out his word play
The answer is the third one
1). For this one the quote is "Being Southerners, it was a source of shame to some members of the family that we had no recorder ancestors on either side of the Battle of Hastings"(3-4).
2). The quotation for this one is "...people still looked at the Radley Place, unwilling to discard their initial suspicions"(10-11).
3). Quotation "The sheriff hadn't the heart to put him in jail alongside Negroes, so Boo was locked in the courthouse basement" (14).
4). "...nowhere to go, nothing to buy, and no money to buy it with, nothing to see outside the boundaries of Maycomb County" at this part of the text: (6).
Hope this helps.
Answer: You should keep school environment clean because a clean enviroment is a healthy enviroment. It also sets an example for future students joining the school.