Which fabric did byzantines learn to make in the sixth century, breaking china's long-guarded secret?

answer:

it caused mass african migration, african populations to grow, african empires to topple, and racism against slaves to emerge.

the anwser is a) to prevent military conflict

the safahids used force when persuasion to convert from being a sunni muslim to embrace shi'ism was not effective. they also persecute shi'ites who have different views from their imposed teachings.