Largely because of the dedication of their soldiers and their genius for adapting to new weapons, the Ottomans were able to

Aoccupy Spain and convert the people to a new religion.

Bmaintain their empire despite civil war and foreign invasions.

Cconquer and control the territory formerly held by the Mongols.

Drule their empire solely through the use of threats and military force.

personally i think it's c. But i just wanted confirmation