Plss help can you answer this multiples choices plss​

Why did warren g. harding win the election of 1920

1: how did the rise of rulers with total power in europe and asia lead to world war 2?

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.