What unite the islamic empire as it spread under the abbasid dynasty?

the jizra
social classes
arabic language
medical advancements

The Arabic language

Explanation:

The Abbasids revolt was centered over the lack of representation from the mawali (converted), the influence exerted by regions traditionally identified with the Byzantines, and the use of the Byzantine bureaucratic framework.

After deposing the Ummayad, one radical change was the use of Arabic as lingua franca was imposed over the empire. This was initiated by the Ummayads, but with the Abbasids was finally complete. Therefore, the identity of Islam was based on membership to the umma and the language. That is the reason why the Empire survived as an entity for another 200 years until the contradictions between classes and the atomization of power emptied the Caliphate from real political power.

hello!

according to the passage the most suitable options are two. the first one is "by leading the aef to victory in several key battles" like the battle of saint- mihiel and the battle of cantigny mentioned in the passage you copied here. the second one is "by the aef and allied forces defeat germany" since the passage says that his army destroy the german resistance in the meuse- argonne offensive. and also, "by insisting that the aef operate as an independent force".

hope this