Which impact did the ottoman empire have on the byzantine empire in the 15th century?

A. Ottoman conquests substantially weakened the Byzantine Empire.

Explanation:

The Byzantine Empire was the Eastern Roman Empire that survived throughout the Medieval period. However, during the 14th century, the empire started to weaken. They were constantly attacked by the Latins, the Serbians, the Bulgarians and the Ottoman Turks. They also dealt with plagues, economic decline and territorial changes. Eventually, the Ottoman Turks conquered Constantinople in 1453.

(d) rivers.

explanation:

civilizations developed around rivers because their waters provided places to hunt and fish. also, as the rivers flooded, the lands around them became fertile. this allowed them to support farming. this is especially true of the nile river, which flooded the same time each year.