Which of the following statements about the ottoman empire is not correct?

the ottoman empire was a multicultural empire, with turks, greeks, romanians, arabs, and others in powerful positions.

as time went on, the ottoman empire became more technologically sophisticated compared to western europe.

the center of the ottoman empire was in turkey, and at its height the empire ruled over greece, serbia, egypt, and most of the arab world.

other multi-ethnic empires, like the austro-hungarian empire, did not want greeks and serbs to revolt from the ottomans.