7. C. inclusive
After the abbasids obtained power, they change the social structure in their territories so it's become more inclusive to non-arab Muslims. They started to accept Persian Muslims as scholars and nobles. They also entrusted the Persians to help regulate non-Arab Muslims territory that still belong to the Abbasid.
8. A. Calligraphy
Idolatry refers to the worships of a certain creatures or humans as an idol, and this is seen as taboo by islamic culture. Creating statues of heroic figures that being done by the Greeks and the Romans is seen as the act of idolatry. Because of this, islamic culture turn to caligraphy (the art of aesthetic writing) as their art mastery.
9. A. Algebra
Even though many scholars involved in the development, Al-Khwarizmi is the most famous figure among those scholars. In his books, he introduced linear and quadratic equations to the world, in which we can learn on how to quadratic equations by completing the square along with the justifications on how his method is correct. Due to this accomplishment, he was appointed as the leader of House of Wisdom in Baghdad
