Which mathematician was also the world’s first computer programmer?

Ada lovelace was also the worlds first computer programmer

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).

i think the answer is d. good luck.