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).
Answer:
In early August 1964, two U.S. destroyers stationed in the Gulf of Tonkin in Vietnam radioed that they had been fired upon by North Vietnamese forces. In response to these reported incidents, President Lyndon B. Johnson requested permission from the U.S. Congress to increase the U.S. military presence in Indochina.
