What recent tactic was a fast way the german fought in the skies

Each of the following countries was part of the big four at the paris peace conference except a. russia b. italy c. germany d. britain

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.

What were some of the most important native items adopted by europeans ? what impact did they have on european life ?