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 statistical and economic theory based on the idea that global oil production has reached a limi and is declining. The first one is the answer
