Does the sentence "Kufa fell to the Hashimiyya in 749, the last Umayyad stronghold in Iraq, Wasit, was placed under siege, and in November of the same year Abu al-Abbas was recognized as the new caliph in the mosque at Kufa.[citation needed]" answer the question "Who was the Umayyad governor of Khurasan who was defeated by Abu Muslim?"

Options are:
A). yes;
B). no;
B).