The correct answer is D.
There are between 25 and 35 million Kurds in the world. They are one of the indigenous peoples of the Mesopotamian plains and highlands. Today, these regions are divided between : south-eastern Turkey, north-eastern Syria, northern Iraq, north-western Iran and south-western Armenia. The Kurds are a minority in each of these countries.
The Kurds make up the fourth largest ethnic group in the Middle East, but they have never obtained a permanent nation state.
In the early 20th centuries many Kurds started plans to crate their own country called Kurdistan. Provision for a Kurdish state was made by western Allies in the 1920 treaty of Sevres. The treaty of Lausanne, 1923, dashed their hopes as it established the boundaries of modern Turkey without making a provision for a Kurdish state. Over the next years, any move by Kurds to set up an independent state was brutally quashed.
At the moment, the Kurds are at the forefront of the fight against IS ( Islamic State).