What was one reason that immigrants came to america in the late 1800s?

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.

American troops were worried about cantracting in cuba a. yellow fever b. hepatitis c. polio

The viceroy of spain asked that coronado's expadition be cristian and apostolic and not a buchery, what does that mean and did cornado follow his orders