What was the declaration of pilnitz

Which of the following terms could be applied to the non-aligned nations during the cold war

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.

Was the battle of iwo jima over after us troops raised the flag on mt. suribachi?