Why were steamboats an improvement over earlier forms of transportation like horses and wagons?

A. They could travel more places

B. They required fewer people to operate.

c. They used less power.

D. They could transport goods to market faster.

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).