Answer:
a. both societies were unified by shared religious traditions.
Step-by-step explanation:
During the Islamic Golden Age, the Muslim world was organized in caliphates. These were similar to Western European kingdoms in that they were unified by their shared religious traditions. Under this type of regime, the arts and culture of the Muslim World reached their height. Sciences such as astronomy, algebra, calculus, chemistry, botany and medicine flourished during this time period. Moreover, literary production increased, libraries were created and the knowledge of the Greek and Roman world was preserved.