How did ERA help promote equality for women?

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).

answer:

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

i believe a   because i took this test last month