- The answer that replaces the question mark is:
A. expanded the Muslim empire to its greatest extent.
- It is important to mention that the Umayyad rule lasted from 661 to 750 DC. During the last reign of the great Umayyad caliph called Hisham (which lasted from 724 to 743, and who was the fourth son of 'Abd al-Malik to succeed to the caliphate), the Arab empire reached its greatest extent. They spread to North Africa, Spain as well as South Asia.
- Below you can find an image of the Muslim Empire by 750 DC.