To show that change was happening in the United States
Normandy was the area where Allied forces launched a campaign to take back France in WWII. It started with D-Day. It was called Operation Overlord, which was the Battle of Normandy, essentially.
The correct answer to this question is "customs." Customs refer to the traditional way and the accepted way of behaving within a specific society, time, or place. It is an established practice. So when Sean spit on the floor of the library, it was clear that he was totally unaware of society’s customs. Thank you for posting your question. I hope that this answer helped you. Let me know if you need more help.