How did the world war I create the conditions that caused the Great Migration

Brainliestttme : )why was the launch of sputnik in 1957 important? -most in the u.s. had not thought the soviets were capable of producing satellite technology.- it made clear that the u.s. space program was dominant.- most in the soviet union had not thought the u.s. was capable of launching manned aircraft. -it established the fact that a more dangerous hydrogen bomb could be created.

Which of these statements accurately describes siddhartha gautama, the founder of buddhism?

Which factor has played the most important role in changing the way history is studied over time?