The correct answer is A.
The human race was not originated in America. The first settlers were nomadic people from the Paleolithic era, who arrived in the continent approximately 15,000 years ago using the Beringia land bridge. This crossing was possible because the sea level had decreased abruptly after the Last Glacial Maximum. Today this piece of land has become the Bearing Strait, separating Siberia (Rusia) and Alaska (US).
A. the amount of time they spent building the wall
I think the answer is A, when I looked at the picture and did some research, I found that the wall is 70 miles long so it's pretty obvious that they spent a lot of time making it in ancient old times.
It forms the way that the people apart of that nation percieve their country. As well it encourages almost romantacizing conflict in the way that it seems epic and more heroic. This can be dangerous because it starts to make peoples first reaction to an issue start to revolve around conflict. For example if a country is being faced with a possible global crisis a possible solution that is always on the table is war and battle because their whole lives in that country they have been exposed to that concept and therefore is more familiar to them. That "our country has to have a strong milotary this is America for gosh sake!" (just an example) It creates a connection between national identity and conflict, which serves to make both more prevelent.
