They followed animals and found a good place to live.
People migrated from Asia to the Americas because they followed animals and found a good place to live.
Historians and archeologist think that after the last ice age, a natural frozen bridge allowed people from Asia to cross to America through the Bering Strait. The strait separates Russia from Alaska by 58 miles. Because the territory was frozen, humans in that time could follow animal herds to hunt them and feed their families
Fear of the attack of (assuming) German nazi
Answer:
the US put themselves in icolation and ignores the rest of the world
I’d go with C. Jazz and the dance “The Charleston” were big and new in the 1920s.
Not A, because The Great War, World War I, ended in 1918.
Not B, because the Panama Canal was built from 1904 to 1914.
Regarding D: Telegraphs were sent from the 1840s-1977. If the question is supposed to have more than one answer, this would be a good second answer. But if the question has only one answer, go with C.