Which descriptions of the Ottoman Empire are accurate? Choose ALL answers that are correct. A. founded by Osman in the thirteenth century

B. included territory that is now part of Turkey, Greece, and Egypt at its height

C. had a brief moment of glory before being conquered by Mongols

D. expanded through Africa and Asia but could not successfully invade Europe

E. experienced frequent conflict with Safavid Shi'ites as Sunni Muslims