Answer:
C. Universal Islamic law.
D. To translate literature into Arabic.
Step-by-step explanation:
The fact that the Islamic empire enjoyed universal Islamic law allowed this vast territory to become united during the Golden Age of Islam. Moreover, the unification allowed for science, math, philosophy, medicine, literature and other arts and science to spread all over the empire.
The main purpose of the House of Wisdom was to translate literature into Arabic. This work was performed by scholars who came to the region to study in the advanced empire. The work of the House of Wisdom allowed many works of antiquity to be preserved for the future.