Abbasid defeated Ummayad in__________?

Abbasid defeated Ummayad in__________?

A. 751 AD
B. 755 AD
C. 750 AD
D. None of these

The Abbasids overthrew the Umayyad dynasty in 750 CE, supporting the mawali, or non-Arab Muslims, by moving the capital to Baghdad in 762 CE.