Magna carta is most important for which reason?

D) it put limits on the monarch's powers

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).

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.