(A) It lost territory.
(B) It collapsed.
(C) It became Turkey.
(D) ** It kept its territory.
EXPLANATIONS BELOW
Concept note-1: -During a period of decline, the Empire lost much of its territory in southeastern Europe and the Balkans. After World War I, the Ottoman Empire collapsed, leading to the establishment of the modern Republic of Turkey in 1923 and to the creation of other new states in the Middle East.
Concept note-2: -The demise of the Ottoman Empire (Ottoman Caliphate) made a lasting impact to the Muslim world. Britain and France curved up the Middle East through Sykes-Picot Agreement and gave birth to a new Middle East where oil and petrodollar shaped the politics and economy under their patronage.
Concept note-3: -The Ottoman Empire mobilized a total of 2, 850, 000 people between the years 1914 and 1918. The first official figures on the military losses of the Ottoman Empire came shortly after the armistice. On 30 January 1919, the Ottoman government announced the military losses of the Empire as being 2, 290, 000.
Concept note-4: -From 1699 onwards, the Ottoman Empire began to lose territory over the course of the next two centuries due to internal stagnation, costly defensive wars, European colonialism, and nationalist revolts among its multiethnic subjects.