Describe the 3 major Islamic Empires from the 1400's - 1800s?

Why was russia drawn into a conflict with germany after ausria-hungary declared war on serbia ?

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.

Which statement is the most accurately describes the reasons for the seven years war in north america