Find me 3 primary sources for NHD with the topic: Border Patrol 1924? If you can give me the website name or link

Arguably one of the most important inventions of the 20th century was a) the transistor. b) air conditioning. c) the vacuum cleaner. d) radio broadcasting.

Which option best summarizes what is expected of citizens in a domocracy?

Which of the following could affect the human population? a hurricane makes landfall on an uninhabited island.a deadly virus emerges that can pass from human to human.a civil war breaks out in italy.a solar eclipse occurs.