Which technological breakthrough of the 1950s revolutionized the way that americans kept up with news and world events?

Ineed to write an essay about harriet tubman

Following archduke franz ferdinand's assassination, austro-hungarian leaders: a. aided the ottoman empire in its campaign to keep serbia under its control. b. executed nearly all prominent serbs living in austria-hungary c. threatened to invade serbia if serb leaders did not agree to a set of strict demands. d.. formed an alliance with great britain to protect austria-hungary from future attacks.

Why did the paris peace conference negotiations last over a year?