Final answer:
The true statement regarding the Ottoman Empire is option D, as Egypt managed to maintain a level of autonomy under Ottoman rule until the British took control in the late 19th century, before the 20th century.
Step-by-step explanation:
The Ottoman Empire was indeed a diverse and expansive empire, reaching its zenith under Sultan Suleiman the Magnificent. It controlled significant trade routes and allowed for a degree of religious tolerance and cultural diversity through systems like the millet system, which provided autonomy to different religious communities. While it is true that the empire was not primarily made of Christians but rather had a Muslim majority, there was a considerable Christian population, especially in the European territories of the Empire
. The Ottoman Empire did encounter European imperialism, notably with Egypt falling under British control before the 20th century, yet its strategic significance and military power allowed for some autonomy in specific regions like Egypt until the late 19th century.