Which of the following are examples of early technology?

What is the orthodox interpretation of why the cold war started

Why did poland, hungary, and east germany join the warsaw pact? a)their people voted to join in free elections. b)their efforts to join nato failed. c)they wanted to stop the spread of communism in europe. d)they were soviet satellites that had little choice.

How did louis sullivan and william jenney change the face of american cities in the late 1800s