British history is often divides into ears named after the king or queen who ruled over

True, not false

Explanation:

Question was a tad confusing

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).

b - those executed came from every social and economic class